Merge branch '54-push-data-from-host-to-server' into 'develop'

Refactor of Host ESP32

See merge request !24

.clang-format

@@ -9,6 +9,7 @@ AllowShortFunctionsOnASingleLine: Inline
 AlwaysBreakTemplateDeclarations: Yes
 BreakBeforeBinaryOperators: NonAssignment
 BreakBeforeBraces: Custom
+NamespaceIndentation: All
 BraceWrapping:
   AfterFunction: false
 ...

host/host_central_mast/include/MessageType.h

+//
+// Created by zoe on 1/24/23.
+//
+
+#ifndef HOST_CENTRAL_MAST_MESSAGETYPE_H
+#define HOST_CENTRAL_MAST_MESSAGETYPE_H
+
+enum MessageType { dataAck, hostChange };
+
+typedef struct response {
+    MessageType type;
+    uint8_t mac[6];
+    long time; // Clang-Tidy: Narrowing conversion from 'unsigned long' to signed type 'long' is implementation-defined
+               // (see rtc in main.cpp)
+} response;
+#endif // HOST_CENTRAL_MAST_MESSAGETYPE_H

host/host_central_mast/lib/TimeManager/TimeManager.cpp → host/host_central_mast/lib/NTPManager/NTPManager.cpp

@@ -2,18 +2,18 @@
 // Created by zoe on 12/19/22.
 //
 
-#include "TimeManager.h"
+#include "NTPManager.h"
 
-TimeManager::TimeManager(TinyGsmSim7000 &modem) : modem(modem) {}
+NTPManager::NTPManager(TinyGsmSim7000 &modem) : modem(modem) {}
 
-void TimeManager::syncNTP(const std::string &ntpServer, const std::string &backupNtpServer) {
+void NTPManager::syncNTP(const std::string &ntpServer, const std::string &backupNtpServer) {
     // create list of ntp servers
     std::vector<std::string> ntpServers;
     ntpServers.push_back(ntpServer);
     ntpServers.push_back(backupNtpServer);
     tryNtpServerSync(backupNtpServer, ntpServers);
 }
-void TimeManager::tryNtpServerSync(const std::string &backupNtpServer,
+void NTPManager::tryNtpServerSync(const std::string &backupNtpServer,
                                    std::vector<std::string> &ntpServers) { // try to sync ntp with each server
     for (const auto &server : ntpServers) {
         try {
@@ -21,15 +21,16 @@ void TimeManager::tryNtpServerSync(const std::string &backupNtpServer,
             return;
         } catch (NTPException &e) {
             if (server == backupNtpServer) {
-                esp_log_write(ESP_LOG_ERROR, TAG, "Failed to sync NTP with %s (%s)\n", server.c_str(), e.what());
+                esp_log_write(ESP_LOG_ERROR, TAG_TIMEMANAGER, "Failed to sync NTP with %s (%s)\n", server.c_str(),
+                              e.what());
             }
-            esp_log_write(ESP_LOG_ERROR, TAG, "Failed to sync NTP with %s (%s). Retrying with backup...\n",
+            esp_log_write(ESP_LOG_ERROR, TAG_TIMEMANAGER, "Failed to sync NTP with %s (%s). Retrying with backup...\n",
                           server.c_str(), e.what());
         }
     }
 }
-void TimeManager::synchronizeNTPWithModem(const std::string &ntpServer) {
-    esp_log_write(ESP_LOG_DEBUG, TAG, "NTP Server Syncing...\n");
+void NTPManager::synchronizeNTPWithModem(const std::string &ntpServer) {
+    esp_log_write(ESP_LOG_DEBUG, TAG_TIMEMANAGER, "NTP Server Syncing...\n");
 
     long error = modem.NTPServerSync(ntpServer.c_str(), timeZone);
     /**
@@ -46,11 +47,11 @@ void TimeManager::synchronizeNTPWithModem(const std::string &ntpServer) {
     if (error != 1 && error != 255) {
         throw NTPException(modem.ShowNTPError(error).c_str());
     } else {
-        esp_log_write(ESP_LOG_DEBUG, TAG, "NTP: Network time synchronization is successful\n");
+        esp_log_write(ESP_LOG_DEBUG, TAG_TIMEMANAGER, "NTP: Network time synchronization is successful\n");
     }
 }
 
-time_t TimeManager::timeToUnixEpochSeconds(const std::string &time, const std::string &format) {
+time_t NTPManager::timeToUnixEpochSeconds(const std::string &time, const std::string &format) {
     //	22/10/27,10:16:20+00
     struct tm tm {};
     time_t dateInEpoch = 0;
@@ -77,11 +78,11 @@ time_t TimeManager::timeToUnixEpochSeconds(const std::string &time, const std::s
     return dateInEpoch;
 }
 
-void TimeManager::writeModemTimeToRTC() {
+void NTPManager::writeModemTimeToRTC() {
     auto gsmDateTimeString = modem.getGSMDateTime(DATE_FULL);
-    esp_log_write(ESP_LOG_DEBUG, TAG, "GSM DateTime: %s\n", gsmDateTimeString.c_str());
+    esp_log_write(ESP_LOG_DEBUG, TAG_TIMEMANAGER, "GSM DateTime: %s\n", gsmDateTimeString.c_str());
     time_t time = timeToUnixEpochSeconds(gsmDateTimeString.c_str());
 
     rtc.setTime(time);
-    esp_log_write(ESP_LOG_INFO, TAG, "Time set to EPOCH: %s\n", String(rtc.getEpoch()).c_str());
+    esp_log_write(ESP_LOG_INFO, TAG_TIMEMANAGER, "Time set to EPOCH: %s\n", String(rtc.getEpoch()).c_str());
 }

host/host_central_mast/lib/TimeManager/TimeManager.h → host/host_central_mast/lib/NTPManager/NTPManager.h

@@ -2,11 +2,12 @@
 // Created by zoe on 12/19/22.
 //
 
-#ifndef HOST_CENTRAL_MAST_TIMEMANAGER_H
-#define HOST_CENTRAL_MAST_TIMEMANAGER_H
+#ifndef HOST_CENTRAL_MAST_NTPMANAGER_H
+#define HOST_CENTRAL_MAST_NTPMANAGER_H
 
 #define TINY_GSM_MODEM_SIM7000
 
+#include "Definitions.h"
 #include "ESP32Time.h"
 #include "NTPException.hpp"
 #include "StringToTimeConversionException.hpp"
@@ -14,13 +15,11 @@
 #include <iomanip>
 #include <string>
 
-class TimeManager {
+class NTPManager {
   public:
-    explicit TimeManager(TinyGsmSim7000 &modem);
+    explicit NTPManager(TinyGsmSim7000 &modem);
 
   private:
-    constexpr static char *TAG = "TimeManager";
-    ESP32Time rtc;
     int timeZone = 0;
 
     // I would like this to be a const reference but the functions used by the modem are not const
@@ -40,4 +39,4 @@ class TimeManager {
     void writeModemTimeToRTC();
 };
 
-#endif // HOST_CENTRAL_MAST_TIMEMANAGER_H
+#endif // HOST_CENTRAL_MAST_NTPMANAGER_H
\ No newline at end of file

host/host_central_mast/lib/TimeManager/StringToTimeConversionException.hpp → host/host_central_mast/lib/NTPManager/StringToTimeConversionException.hpp

@@ -5,16 +5,16 @@
 #ifndef HOST_CENTRAL_MAST_STRINGTOTIMECONVERSIONEXCEPTION_HPP
 #define HOST_CENTRAL_MAST_STRINGTOTIMECONVERSIONEXCEPTION_HPP
 
+#include "NTPManager.h"
 #include <exception>
 #include <string>
-#include "TimeManager.h"
 
 class StringToTimeConversionException : public std::exception {
 public:
     explicit StringToTimeConversionException(const std::string &message) : message(message) {}
 
     const char *what() const noexcept override {
-        esp_log_write(ESP_LOG_ERROR, "TimeManager", "Error converting time to epoch: %s",
+        esp_log_write(ESP_LOG_ERROR, "NTPManager", "Error converting time to epoch: %s",
                       message.c_str());
         return message.c_str();
     }

host/host_central_mast/lib/NetworkConnectionManager/ConnectionManager.cpp

@@ -3,10 +3,6 @@
 //
 
 #include "ConnectionManager.h"
-#include "LTEConnectionException.hpp"
-#include "ModemFunctionalityLevel.h"
-
-#include <utility>
 
 ConnectionManager::ConnectionManager(TinyGsm &modem, GPRSCredentials credentials, ModemPins modemPins)
     : modem(modem), credentials(std::move(credentials)), modemPins(modemPins) {}
@@ -14,17 +10,16 @@ ConnectionManager::ConnectionManager(TinyGsm &modem, GPRSCredentials credentials
 void ConnectionManager::restartModem() {
     // Restart takes quite some time
     // To skip it, call init() instead of restart()
-    esp_log_write(ESP_LOG_DEBUG, TAG_GSM.c_str(), "Restarting modem...\n");
+    esp_log_write(ESP_LOG_DEBUG, TAG_GSM, "Restarting modem...\n");
     if (!modem.restart()) {
-        esp_log_write(ESP_LOG_WARN, TAG_GSM.c_str(),
-                      "Failed to restart modem, attempting to continue without restarting\n");
+        esp_log_write(ESP_LOG_WARN, TAG_GSM, "Failed to restart modem, attempting to continue without restarting\n");
     }
 }
 
 void ConnectionManager::initModem() {
-    esp_log_write(ESP_LOG_DEBUG, TAG_GSM.c_str(), "Initializing modem...\n");
+    esp_log_write(ESP_LOG_DEBUG, TAG_GSM, "Initializing modem...\n");
     if (!modem.init()) {
-        esp_log_write(ESP_LOG_WARN, TAG_GSM.c_str(), "Failed to initialize modem, attempting to continue...\n");
+        esp_log_write(ESP_LOG_WARN, TAG_GSM, "Failed to initialize modem, attempting to continue...\n");
     }
     setModemFunctionalityLevel(MINIMAL);
 }
@@ -100,9 +95,9 @@ bool ConnectionManager::gprsConnect() {
 bool ConnectionManager::isNetworkConnected() {
     return modem.isNetworkConnected();
 }
-std::string ConnectionManager::connect(int port, RequestInformation requestInformation) {
+std::string ConnectionManager::connect(RequestInformation requestInformation) {
     TinyGsmClient client{modem, 0};
-    if (!client.connect(requestInformation.host.c_str(), port)) {
+    if (!client.connect(requestInformation.host.c_str(), requestInformation.port)) {
         throw LTEConnectionException("Failed to connect to host");
     }
 
@@ -115,7 +110,7 @@ std::string ConnectionManager::connect(int port, RequestInformation requestInfor
     while (client.connected()) {
         line += client.readStringUntil('\n');
         if (line == "\r") {
-            esp_log_write(ESP_LOG_DEBUG, TAG_GSM.c_str(), "headers received\n");
+            esp_log_write(ESP_LOG_DEBUG, TAG_GSM, "headers received\n");
             break;
         }
     }
@@ -131,9 +126,11 @@ void ConnectionManager::modemPowerOn() {
 }
 
 void ConnectionManager::modemPowerOff() {
+    // Try to power-off (modem may decide to restart automatically)
+    // To turn off modem completely, please use Reset/Enable pins
     modem.sendAT("+CPOWD=1");
     if (modem.waitResponse(10000L) != 1) {
-        esp_log_write(ESP_LOG_WARN, TAG_GSM.c_str(), "Failed to power off modem\n");
+        esp_log_write(ESP_LOG_WARN, TAG_GSM, "Failed to power off modem\n");
     }
     modem.poweroff();
     pinMode(modemPins.pwr, OUTPUT);
@@ -157,3 +154,28 @@ bool ConnectionManager::waitForNetwork() {
 bool ConnectionManager::gprsDisconnect() {
     return modem.gprsDisconnect();
 }
+void ConnectionManager::logModemInformation() {
+    bool res = modem.isGprsConnected();
+    esp_log_write(ESP_LOG_DEBUG, TAG_GSM, "GPRS connected: %s\n", res ? "true" : "false");
+
+    String ccid = modem.getSimCCID();
+    esp_log_write(ESP_LOG_DEBUG, TAG_GSM, "CCID: %s\n", ccid.c_str());
+
+    String imei = modem.getIMEI();
+    esp_log_write(ESP_LOG_DEBUG, TAG_GSM, "IMEI: %s\n", imei.c_str());
+
+    String imsi = modem.getIMSI();
+    esp_log_write(ESP_LOG_DEBUG, TAG_GSM, "IMSI: %s\n", imsi.c_str());
+
+    String cop = modem.getOperator();
+    esp_log_write(ESP_LOG_DEBUG, TAG_GSM, "Operator: %s\n", cop.c_str());
+
+    IPAddress local = modem.localIP();
+    esp_log_write(ESP_LOG_DEBUG, TAG_GSM, "Local IP: %s\n", local.toString().c_str());
+
+    int csq = modem.getSignalQuality();
+    esp_log_write(ESP_LOG_DEBUG, TAG_GSM, "Signal quality: %d\n", csq);
+}
+bool ConnectionManager::isGprsConnected() {
+    return modem.isGprsConnected();
+}

host/host_central_mast/lib/NetworkConnectionManager/ConnectionManager.h

@@ -7,15 +7,16 @@
 
 #define TINY_GSM_MODEM_SIM7000
 
+#include "Definitions.h"
 #include "GPRSCredentials.h"
+#include "LTEConnectionException.hpp"
 #include "Mode.h"
 #include "ModemFunctionalityLevel.h"
 #include "NetworkMode.h"
 #include "RequestInformation.h"
 #include "StreamDebugger.h"
 #include <TinyGsmClient.h>
-
-static const std::string TAG_GSM = "GSM";
+#include <utility>
 
 class ConnectionManager {
 
@@ -35,7 +36,7 @@ class ConnectionManager {
   public:
     ConnectionManager(TinyGsm &modem, GPRSCredentials credentials, ModemPins modemPins);
 
-    std::string connect(int port, RequestInformation requestInformation);
+    std::string connect(RequestInformation requestInformation);
 
     void enableGPS();
 
@@ -66,6 +67,9 @@ class ConnectionManager {
 
     void unlockSimCard();
     bool waitForNetwork();
+
+    void logModemInformation();
+    bool isGprsConnected();
 };
 
 #endif // HOST_CENTRAL_MAST_CONNECTIONMANAGER_H

host/host_central_mast/lib/NetworkConnectionManager/RequestInformation.h

@@ -6,31 +6,42 @@
 #define HOST_CENTRAL_MAST_REQUESTINFORMATION_H
 
 #include <Arduino.h>
+#include <Definitions.h>
+#include <map>
+
+enum RequestMethod {
+    GET,
+    POST,
+};
 
 struct RequestInformation {
-    String method;
+    RequestMethod method;
+    std::map<String, String> headers;
+    int port;
     String host;
     String path;
     String body;
 
-    RequestInformation(String method, String host, String path, String body) {
+    RequestInformation(const RequestMethod &method, const String &host, const int &port, const String &path,
+                       const String &body, const std::map<String, String> &headers) {
         this->method = method;
+        this->port = port;
+        this->headers = headers;
         this->host = host;
         this->path = path;
         this->body = body;
     }
 
-    // TODO: Move to configuration file
-    const String INFLUXDB_TOKEN =
-        "dUh2gbVLv7e3egqocxriDsJQNUacA9qZ5YXsYtdnVAglnHgy4nx-jDVO7nGlSF34BosfnuwnUDaviC7dQeC5RQ==";
-
     String buildRequest() {
+        String methodString = method == RequestMethod::GET ? "GET" : "POST";
         String request = "";
-        request += method + " " + path + " HTTP/1.1\r\n";
+        request += methodString + " " + path + " HTTP/1.1\r\n";
         request += "Host: " + host + "\r\n";
-        request += "Authorization: Token " + INFLUXDB_TOKEN + "\r\n";
-        request += "User-Agent: ESP32\r\n";
-        request += "Content-Type: text/plain\r\n";
+        request += "User-Agent: ESP32-Host\r\n";
+        for (auto &header : headers) {
+            request += header.first + ": " + header.second + "\r\n";
+        }
+        //        request += "Authorization: Token " + INFLUXDB_TOKEN + "\r\n";
         request += "Content-Length: " + String(body.length()) + "\r\n";
         if (body.length() > 0) {
             request += "\r\n";

host/host_central_mast/lib/ResendManager/ResendManager.cpp

@@ -14,7 +14,7 @@ void ResendManager::init() {
 }
 
 uint ResendManager::getLastResendFileId() const { // get the next file id to be resend
-    auto filesInDirectory = getFilesInDirectory(resendDirectoryPath);
+    auto filesInDirectory = SDUtilities::getFilesInDirectory(resendDirectoryPath);
     // convert the file names to uint
     std::list<uint> fileUintIDs;
 
@@ -38,24 +38,24 @@ uint ResendManager::getLastResendFileId() const { // get the next file id to be
 }
 
 void ResendManager::createResendDirectory() const { // create directory if it doesn't exist
-    createDirectory("/resend");
+    SDUtilities::createDirectory("/resend");
 }
 
 void ResendManager::storeForResend(const String &messageToBeSend) {
     // create file
     String filename = String(nextResendFileId);
-    writeFile(messageToBeSend, resendDirectoryPath + "/" + filename);
+    SDUtilities::writeFile(messageToBeSend, resendDirectoryPath + "/" + filename);
     ResendManager::incrementCount();
 }
 
 std::optional<ResendPointType> ResendManager::loadNextToBeResendMessage() {
     // get first file in resend directory
-    auto filename = getFirstFileNameInDirectory(resendDirectoryPath.c_str());
+    auto filename = SDUtilities::getFirstFileNameInDirectory(resendDirectoryPath.c_str());
 
     if (filename.has_value()) {
 
         // read file
-        auto message = readFile(resendDirectoryPath + "/" + filename.value().c_str());
+        auto message = SDUtilities::readFile(resendDirectoryPath + "/" + filename.value().c_str());
         return ResendPointType{message, filename.value()};
     }
     return std::nullopt;

host/host_central_mast/lib/Utilities/Definitions.h

@@ -6,6 +6,7 @@
 #define HOST_CENTRAL_MAST_DEFINITIONS_H
 
 #include "Arduino.h"
+#include "ESP32Time.h"
 
 #define uS_TO_S_FACTOR 1000000ULL // Conversion factor for micro seconds to seconds
 #define TIME_TO_SLEEP 5           // Time ESP32 will go to sleep (in seconds)
@@ -22,6 +23,23 @@
 #define SD_CS 13
 #define LED_PIN 12
 
+// See all AT commands, if wanted
+// #define DUMP_AT_COMMANDS
+
+#define TAG_ESPNOW "ESPNOW"
+#define TAG_MAIN "MAIN"
+#define TAG_SD "SD"
+#define TAG_GSM "GSM"
+#define TAG_TIMEMANAGER "TIMEMANAGER"
+#define TAG_SDUTILITIES "SDUTILITIES"
+
+#define SD_CARD_FAIL_COUNTER 100
+
+constexpr bool PRINT_TO_SERIAL = true;
+
+// global definition of RTC. Initialised in main
+extern ESP32Time rtc;
+
 const String INFLUXDB_TOKEN =
     "dUh2gbVLv7e3egqocxriDsJQNUacA9qZ5YXsYtdnVAglnHgy4nx-jDVO7nGlSF34BosfnuwnUDaviC7dQeC5RQ==";
 

host/host_central_mast/lib/Utilities/SDCardLogger.cpp

+//
+// Created by zoe on 1/24/23.
+//
+
+#include "SDCardLogger.h"
+
+namespace SDCardLogger {
+
+    char log_print_buffer[512];
+    bool printToSerial = false;
+
+    void printDebugToSerial(bool printToSerialAsWell) {
+        printToSerial = printToSerialAsWell;
+    }
+    int vprintf_into_sd(const char *szFormat, va_list args) {
+        String logstring = "[" + rtc.getDateTime() + "] ";
+        logstring += szFormat;
+
+        if (!SDUtilities::isSDAvailable()) {
+            if (printToSerial) {
+                logstring += " (SD card not available)\n";
+                vprintf(logstring.c_str(), args);
+            }
+            return 1;
+        }
+
+        // write evaluated format string into buffer
+        int ret = vsnprintf(log_print_buffer, sizeof(log_print_buffer), logstring.c_str(), args);
+
+        String date = rtc.getDate();
+        String filename = "/log_" + date + ".txt";
+
+        // output is now in buffer. write to file.
+        if (ret >= 0) {
+            if (!SD.exists(filename)) {
+                File writeLog = SD.open(filename, FILE_WRITE);
+                if (!writeLog) {
+                    Serial.println("Couldn't open " + filename + " for writing");
+                    SDUtilities::setSDAvailable(false);
+                    return 1;
+                }
+                delay(50);
+                writeLog.close();
+            }
+
+            File logFile = SD.open(filename, FILE_APPEND);
+
+            // debug output
+            if (printToSerial) {
+                vprintf(logstring.c_str(), args);
+            }
+            logFile.write((uint8_t *)log_print_buffer, (size_t)ret);
+            // to be safe in case of crashes: flush the output
+            logFile.flush();
+            logFile.close();
+        }
+        return ret;
+    }
+
+} // namespace SDCardLogger

host/host_central_mast/lib/Utilities/SDCardLogger.h

+//
+// Created by zoe on 1/24/23.
+//
+
+#ifndef HOST_CENTRAL_MAST_SDCARDLOGGER_H
+#define HOST_CENTRAL_MAST_SDCARDLOGGER_H
+
+#include "Definitions.h"
+#include "SD.h"
+#include "Utilities.h"
+
+namespace SDCardLogger {
+    void printDebugToSerial(bool printToSerialAsWell);
+    int vprintf_into_sd(const char *szFormat, va_list args);
+}; // namespace SDCardLogger
+
+#endif // HOST_CENTRAL_MAST_SDCARDLOGGER_H

host/host_central_mast/lib/Utilities/Utilities.cpp

@@ -4,148 +4,302 @@
 
 #include "Utilities.h"
 
-void setupSDCard();
-void saveStringToSDCard(const std::string &dataString);
-std::list<String> getFilesInDirectory(const String &dirname) {
-    std::list<String> files;
-    File dir = openDirectory(dirname);
-    while (true) {
-        File nextFile = dir.openNextFile();
-        if (!nextFile) {
-            break;
-        }
-        if (!nextFile.isDirectory()) {
-            files.emplace_back(nextFile.name());
-        }
-        nextFile.close();
-    }
-    return files;
-}
+namespace SDUtilities {
+
+    bool SDAvailable = true;
 
-std::optional<String> getLastFileInDirectory(const String &dirname) {
+    void setSDAvailable(bool sdAvailable) {
+        SDAvailable = sdAvailable;
+    }
 
-    File root = openDirectory(dirname);
-    root.rewindDirectory();
+    // Used to try to remount SD card if it fails more than x times (100)
+    int sdFailCounter = 0;
+
+    bool isSDAvailable() {
+        return SDAvailable;
+    }
 
-    File file = root.openNextFile();
-    while (file) {
-        File nextFile = root.openNextFile();
-        if (!nextFile) {
-            break;
+    void tryRemountingSD() {
+        try {
+            setupSDCard(SD_MISO, SD_MOSI, SD_SCLK, SD_CS);
+            setSDAvailable(true);
+        } catch (SDSetupException &e) {
+            esp_log_write(ESP_LOG_ERROR, TAG_SDUTILITIES, "Couldn't remount SD card: %s\n", e.what());
         }
-        file = nextFile;
+        sdFailCounter = 0;
     }
-    // log
-    if (file) {
-        esp_log_write(ESP_LOG_INFO, "getLastFileInDirectory", "Last file name: %s\n", file.name());
-        return file.name();
-    } else {
-        esp_log_write(ESP_LOG_INFO, "getLastFileInDirectory", "No file found\n");
-        return std::nullopt;
+
+    bool checkSDAvailability(const String &errorMessage) {
+        if (!isSDAvailable()) {
+            sdFailCounter++;
+            if (sdFailCounter % SD_CARD_FAIL_COUNTER == 0) {
+                esp_log_write(ESP_LOG_ERROR, TAG_SDUTILITIES, "SD card not available. Trying to remount...\n");
+                tryRemountingSD();
+            }
+            String message = errorMessage + " (SD card not available, failed " + sdFailCounter + " times)\n";
+            esp_log_write(ESP_LOG_ERROR, TAG_SDUTILITIES, "%s", message.c_str());
+            // if re-mount was successful, this will be true
+            return isSDAvailable();
+        }
+        return true;
+    };
+
+    std::list<String> getFilesInDirectory(const String &dirname) {
+        if (!checkSDAvailability("Couldn't get files in directory " + dirname)) {
+            return {};
+        }
+        std::list<String> files;
+        File dir = openDirectory(dirname);
+        while (true) {
+            File nextFile = dir.openNextFile();
+            if (!nextFile) {
+                break;
+            }
+            if (!nextFile.isDirectory()) {
+                files.emplace_back(nextFile.name());
+            }
+            nextFile.close();
+        }
+        return files;
     }
-}
-File openDirectory(const String &dirname) {
-    File root = SD.open(dirname);
-    if (!root) {
-        esp_log_write(ESP_LOG_ERROR, "openDirectory", "Failed to open directory\n");
-        throw;
+
+    std::optional<String> getLastFileInDirectory(const String &dirname) {
+
+        if (!checkSDAvailability("Couldn't get last file in directory " + dirname)) {
+            return std::nullopt;
+        }
+
+        File root = openDirectory(dirname);
+        root.rewindDirectory();
+
+        File file = root.openNextFile();
+        while (file) {
+            File nextFile = root.openNextFile();
+            if (!nextFile) {
+                break;
+            }
+            file = nextFile;
+        }
+        // log
+        if (file) {
+            esp_log_write(ESP_LOG_INFO, TAG_SDUTILITIES, "Last file name: %s\n", file.name());
+            return file.name();
+        } else {
+            esp_log_write(ESP_LOG_INFO, TAG_SDUTILITIES, "No file found\n");
+            return std::nullopt;
+        }
     }
-    if (!root.isDirectory()) {
-        esp_log_write(ESP_LOG_ERROR, "openDirectory", "Not a directory\n");
-        throw;
+    File openDirectory(const String &dirname) {
+
+        if (!checkSDAvailability("Couldn't open directory " + dirname)) {
+            throw;
+        }
+
+        File root = SD.open(dirname);
+        if (!root) {
+            esp_log_write(ESP_LOG_ERROR, TAG_SDUTILITIES, "Failed to open directory\n");
+            throw;
+        }
+        if (!root.isDirectory()) {
+            esp_log_write(ESP_LOG_ERROR, TAG_SDUTILITIES, "Not a directory\n");
+            throw;
+        }
+        return root;
     }
-    return root;
-}
-std::optional<String> getFirstFileNameInDirectory(const String &dirname) {
 
-    File root = openDirectory(dirname);
-    root.rewindDirectory();
+    std::optional<String> getFirstFileNameInDirectory(const String &dirname) {
 
-    File file = root.openNextFile();
-    if (file) {
-        esp_log_write(ESP_LOG_INFO, "getFirstFileNameInDirectory", "file found: %s\n", file.name());
-        return file.name();
-    } else {
-        esp_log_write(ESP_LOG_INFO, "getFirstFileNameInDirectory", "no file found\n");
-        return std::nullopt;
+        if (!checkSDAvailability("Couldn't get first file in directory " + dirname)) {
+            return std::nullopt;
+        }
+
+        File root = openDirectory(dirname);
+        root.rewindDirectory();
+
+        File file = root.openNextFile();
+        if (file) {
+            esp_log_write(ESP_LOG_INFO, TAG_SDUTILITIES, "file found: %s\n", file.name());
+            return file.name();
+        } else {
+            esp_log_write(ESP_LOG_INFO, TAG_SDUTILITIES, "no file found\n");
+            return std::nullopt;
+        }
     }
-}
 
-File openForWrite(const String &filePath) {
-    File file = SD.open(filePath, FILE_WRITE);
-    if (!file) {
-        esp_log_write(ESP_LOG_ERROR, "SD", "Failed to open file for writing\n");
-        throw;
+    File openForWrite(const String &filePath) {
+
+        if (!checkSDAvailability("Couldn't open file " + filePath + " for writing")) {
+            throw;
+        }
+
+        File file = SD.open(filePath, FILE_WRITE);
+        if (!file) {
+            esp_log_write(ESP_LOG_ERROR, TAG_SDUTILITIES, "Failed to open file for writing\n");
+            throw;
+        }
+        return file;
     }
-    return file;
-}
 
-File openForRead(const String &filePath) {
-    File file = SD.open(filePath, FILE_READ);
-    if (!file) {
-        esp_log_write(ESP_LOG_ERROR, "SD", "Failed to open file for reading\n");
-        throw;
+    File openForRead(const String &filePath) {
+
+        if (!checkSDAvailability("Couldn't open file " + filePath + " for reading")) {
+            throw;
+        }
+
+        File file = SD.open(filePath, FILE_READ);
+        if (!file) {
+            esp_log_write(ESP_LOG_ERROR, TAG_SDUTILITIES, "Failed to open file for reading\n");
+            throw;
+        }
+        return file;
     }
-    return file;
-}
 
-void writeFile(const String &messageToBeSend, const String &filePath) {
-    File file = openForWrite(filePath);
-    if (file.print(messageToBeSend)) {
-        esp_log_write(ESP_LOG_INFO, "SD", "File written %s\n", filePath.c_str());
-    } else {
-        esp_log_write(ESP_LOG_ERROR, "SD", "Write failed %s\n", filePath.c_str());
-        throw;
+    void writeFile(const String &messageToBeSend, const String &filePath) {
+
+        if (!checkSDAvailability("Couldn't write to file " + filePath)) {
+            throw;
+        }
+
+        File file = openForWrite(filePath);
+        if (file.print(messageToBeSend)) {
+            esp_log_write(ESP_LOG_INFO, TAG_SDUTILITIES, "File written %s\n", filePath.c_str());
+        } else {
+            esp_log_write(ESP_LOG_ERROR, TAG_SDUTILITIES, "Write failed %s\n", filePath.c_str());
+            throw;
+        }
+        file.close();
     }
-    file.close();
-}
-String readFile(const String &filePath) {
-    File file = openForRead(filePath);
 
-    String ret;
+    String readFile(const String &filePath) {
+
+        if (!checkSDAvailability("Couldn't read file " + filePath)) {
+            throw;
+        }
+
+        File file = openForRead(filePath);
 
-    while (file.available()) {
-        ret += (char)file.read();
+        String ret;
+
+        while (file.available()) {
+            ret += (char)file.read();
+        }
+
+        file.close();
+        return ret;
     }
 
-    file.close();
-    return ret;
-}
+    void createDirectory(const String &dirname) {
 
-void createDirectory(const String &dirname) {
-    if (!SD.exists(dirname)) {
-        SD.mkdir(dirname);
-        esp_log_write(ESP_LOG_INFO, "createDirectory", "Created directory: %s\n", dirname.c_str());
-    } else {
-        esp_log_write(ESP_LOG_WARN, "createDirectory", "Directory already exists\n");
+        if (!checkSDAvailability("Couldn't create directory " + dirname)) {
+            throw;
+        }
+
+        if (!SD.exists(dirname)) {
+            SD.mkdir(dirname);
+            esp_log_write(ESP_LOG_INFO, TAG_SDUTILITIES, "Created directory: %s\n", dirname.c_str());
+        } else {
+            esp_log_write(ESP_LOG_WARN, TAG_SDUTILITIES, "Directory already exists\n");
+        }
     }
-}
 
-void setupSDCard(int MISO, int MOSI, int SCLK, int CS) {
-    SPI.begin(SCLK, MISO, MOSI, CS);
-    if (!SD.begin(CS)) {
-        esp_log_write(ESP_LOG_ERROR, "Utilities", "Card MOUNT FAIL\n");
-        throw SDSetupException("Card MOUNT FAIL");
-    } else {
-        uint32_t cardSize = SD.cardSize() / (1024 * 1024);
-        String sdcardSizeString = "SDCard Size: " + String(cardSize) + "MB";
-        esp_log_write(ESP_LOG_DEBUG, "Utilities", "%s\n", sdcardSizeString.c_str());
+    void setupSDCard(int MISO, int MOSI, int SCLK, int CS) {
+        SPI.begin(SCLK, MISO, MOSI, CS);
+        if (!SD.begin(CS)) {
+            esp_log_write(ESP_LOG_ERROR, TAG_SDUTILITIES, "Card MOUNT FAIL\n");
+            throw SDSetupException("Card MOUNT FAIL");
+        } else {
+            uint32_t cardSize = SD.cardSize() / (1024 * 1024);
+            String sdcardSizeString = "SDCard Size: " + String(cardSize) + "MB";
+            esp_log_write(ESP_LOG_DEBUG, TAG_SDUTILITIES, "%s\n", sdcardSizeString.c_str());
+        }
     }
-}
 
-void saveStringToSDCard(const std::string &dataString) {
-    File dataFile = SD.open("/datalog.txt", FILE_APPEND);
+    void saveStringToSDCard(const std::string &dataString) {
+
+        if (!checkSDAvailability("Couldn't save string to SD card")) {
+            throw SDCardException("Couldn't save string to SD card");
+        }
 
-    // if the file is available, write to it:
-    if (dataFile) {
-        if (dataString.length() > 0) {
-            dataFile.println(dataString.c_str());
+        File dataFile = SD.open("/datalog.txt", FILE_APPEND);
+
+        // if the file is available, write to it:
+        if (dataFile) {
+            if (dataString.length() > 0) {
+                dataFile.println(dataString.c_str());
+            }
+            dataFile.close();
+        }
+        // if the file isn't open, pop up an error:
+        else {
+            esp_log_write(ESP_LOG_ERROR, TAG_SDUTILITIES, "error opening datalog.txt\n");
+            throw SDCardException("error opening datalog.txt");
         }
-        dataFile.close();
     }
-    // if the file isn't open, pop up an error:
-    else {
-        esp_log_write(ESP_LOG_ERROR, "Utilities", "error opening datalog.txt\n");
-        throw SDCardException("error opening datalog.txt");
+} // namespace SDUtilities
+
+// I don't think this does anything. Copied from the example
+void turnOffLEDs() { // Set LED OFF
+    pinMode(LED_PIN, OUTPUT);
+    digitalWrite(LED_PIN, HIGH);
+
+    pinMode(PWR_PIN, OUTPUT);
+    digitalWrite(PWR_PIN, HIGH);
+    delay(300);
+    digitalWrite(PWR_PIN, LOW);
+}
+
+String getMacAddressAsString(const uint8_t *mac) {
+    String macAddress;
+    for (int i = 0; i < 6; i++) {
+        macAddress += String(mac[i], HEX);
+    }
+    esp_log_write(ESP_LOG_DEBUG, TAG_ESPNOW, "MAC: %s\n", macAddress.c_str());
+    return macAddress;
+}
+
+String documentToLineProtocolString(const DynamicJsonDocument &doc) {
+    String measurementType = doc["measurementType"].as<String>();
+    String sensorName = doc["sensorName"].as<String>();
+    String timestamp = doc["timestamp"].as<String>();
+    String protocol = doc["protocol"].as<String>();
+    String value = doc["value"].as<String>();
+    String channel = doc["channel"].as<String>();
+    String clientMac = doc["clientMac"].as<String>();
+
+    String lineData = sensorName + ",clientMac=" + clientMac + ",protocol=" + protocol + ",channel=" + channel + " "
+                      + measurementType + "=" + value + " " + timestamp;
+    return lineData;
+}
+DynamicJsonDocument parseReceivedJsonData(char *data) {
+    DynamicJsonDocument doc(250);
+    auto error = deserializeJson(doc, data);
+    if (error) {
+        esp_log_write(ESP_LOG_ERROR, TAG_ESPNOW, "Error while parsing json: %s\n", error.c_str());
+        // TODO error handling
     }
+    return doc;
+}
+
+String documentToServerReadableString(const DynamicJsonDocument &doc) {
+    StaticJsonDocument<1024> serverDoc;
+    String hostMacAddressString = WiFi.macAddress();
+    hostMacAddressString.replace(":", "");
+    hostMacAddressString.toLowerCase();
+
+    serverDoc["host"] = hostMacAddressString;
+    serverDoc["client"] = doc["clientMac"].as<String>();
+    serverDoc["sensorProtocol"] = doc["protocol"].as<String>();
+    serverDoc["protocolAddress"] = doc["channel"].as<String>();
+    serverDoc["hardwareName"] = doc["sensorName"].as<String>();
+    // each value is a element in the readigs array
+    JsonArray readings = serverDoc.createNestedArray("readings");
+    JsonObject reading = readings.createNestedObject();
+    reading["name"] = doc["measurementType"].as<String>();
+    reading["value"] = doc["value"].as<float>();
+    serverDoc["time"] = doc["timestamp"].as<uint32_t>();
+
+    String serverString;
+    serializeJson(serverDoc, serverString);
+    esp_log_write(ESP_LOG_DEBUG, TAG_ESPNOW, "Server readable data: %s\n", serverString.c_str());
+    return serverString;
 }
\ No newline at end of file

host/host_central_mast/lib/Utilities/Utilities.h

@@ -5,21 +5,34 @@
 #ifndef HOST_CENTRAL_MAST_UTILITIES_H
 #define HOST_CENTRAL_MAST_UTILITIES_H
 
+#include "ArduinoJson.h"
 #include "SD.h"
 #include "SDCardException.h"
 #include "SDSetupException.h"
+#include "WiFi.h"
 #include <Arduino.h>
 #include <Definitions.h>
 #include <WString.h>
 #include <list>
 
-File openDirectory(const String &dirname);
-std::list<String> getFilesInDirectory(const String &dirname);
-std::optional<String> getFirstFileNameInDirectory(const String &dirname);
-std::optional<String> getLastFileInDirectory(const String &dirname);
-void writeFile(const String &messageToBeSend, const String &filePath);
-String readFile(const String &filePath);
-void createDirectory(const String &dirname);
-void setupSDCard(int MISO, int MOSI, int SCLK, int CS);
-void saveStringToSDCard(const std::string &dataString);
+namespace SDUtilities {
+    File openDirectory(const String &dirname);
+    std::list<String> getFilesInDirectory(const String &dirname);
+    std::optional<String> getFirstFileNameInDirectory(const String &dirname);
+    std::optional<String> getLastFileInDirectory(const String &dirname);
+    void writeFile(const String &messageToBeSend, const String &filePath);
+    String readFile(const String &filePath);
+    void createDirectory(const String &dirname);
+    void setupSDCard(int MISO, int MOSI, int SCLK, int CS);
+    void saveStringToSDCard(const std::string &dataString);
+    void setSDAvailable(bool sdAvailable);
+    bool isSDAvailable();
+} // namespace SDUtilities
+
+void turnOffLEDs();
+String getMacAddressAsString(const uint8_t *mac);
+String documentToLineProtocolString(const DynamicJsonDocument &doc);
+DynamicJsonDocument parseReceivedJsonData(char *data);
+String documentToServerReadableString(const DynamicJsonDocument &doc);
+
 #endif // HOST_CENTRAL_MAST_UTILITIES_H

host/host_central_mast/src/main2.cpp

-///**************************************************************
-// *
-// * This sketch connects to a website and downloads a page.
-// * It can be used to perform HTTP/RESTful API calls.
-// *
-// * TinyGSM Getting Started guide:
-// *   https://tiny.cc/tinygsm-readme
-// *
-// **************************************************************/
-//
-//// Select your modem:
-//// #define TINY_GSM_MODEM_SIM800
-//// #define TINY_GSM_MODEM_SIM808
-//// #define TINY_GSM_MODEM_SIM868
-//// #define TINY_GSM_MODEM_SIM900
-//#define TINY_GSM_MODEM_SIM7000
-//// #define TINY_GSM_MODEM_SIM7000SSL
-//// #define TINY_GSM_MODEM_SIM7080
-//// #define TINY_GSM_MODEM_SIM5360
-//// #define TINY_GSM_MODEM_SIM7600
-//// #define TINY_GSM_MODEM_UBLOX
-//// #define TINY_GSM_MODEM_SARAR4
-//// #define TINY_GSM_MODEM_M95
-//// #define TINY_GSM_MODEM_BG96
-//// #define TINY_GSM_MODEM_A6
-//// #define TINY_GSM_MODEM_A7
-//// #define TINY_GSM_MODEM_M590
-//// #define TINY_GSM_MODEM_MC60
-//// #define TINY_GSM_MODEM_MC60E
-//// #define TINY_GSM_MODEM_ESP8266
-//// #define TINY_GSM_MODEM_XBEE
-//// #define TINY_GSM_MODEM_SEQUANS_MONARCH
-//
-//// Set serial for debug console (to the Serial Monitor, default speed 115200)
-//#define SerialMon Serial
-//
-//// Set serial for AT commands (to the module)
-//// Use Hardware Serial on Mega, Leonardo, Micro
-//#ifndef __AVR_ATmega328P__
-//#define SerialAT Serial1
-//
-//// or Software Serial on Uno, Nano
-//#else
-//#include <SoftwareSerial.h>
-//SoftwareSerial SerialAT(2, 3); // RX, TX
-//#endif
-//
-//// Increase RX buffer to capture the entire response
-//// Chips without internal buffering (A6/A7, ESP8266, M590)
-//// need enough space in the buffer for the entire response
-//// else data will be lost (and the http library will fail).
-//#if !defined(TINY_GSM_RX_BUFFER)
-//#define TINY_GSM_RX_BUFFER 650
-//#endif
-//
-//// See all AT commands, if wanted
-//#define DUMP_AT_COMMANDS
-//
-//// Define the serial console for debug prints, if needed
-//#define TINY_GSM_DEBUG SerialMon
-//
-//// Range to attempt to autobaud
-//// NOTE:  DO NOT AUTOBAUD in production code.  Once you've established
-//// communication, set a fixed baud rate using modem.setBaud(#).
-//#define GSM_AUTOBAUD_MIN 9600
-//#define GSM_AUTOBAUD_MAX 115200
-//
-//// Add a reception delay, if needed.
-//// This may be needed for a fast processor at a slow baud rate.
-//// #define TINY_GSM_YIELD() { delay(2); }
-//
-//// Uncomment this if you want to use SSL
-//// #define USE_SSL
-//
-//// Define how you're planning to connect to the internet.
-//// This is only needed for this example, not in other code.
-//#define TINY_GSM_USE_GPRS true
-//#define TINY_GSM_USE_WIFI false
-//
-//// set GSM PIN, if any
-//#define GSM_PIN ""
-//
-//// Your GPRS credentials, if any
-//const char apn[] = "m2m.public.at";
-//const char gprsUser[] = "";
-//const char gprsPass[] = "";
-//
-//// Your WiFi connection credentials, if applicable
-//const char wifiSSID[] = "YourSSID";
-//const char wifiPass[] = "YourWiFiPass";
-//
-//// Server details
-//const char server[] = "vsh.pp.ua";
-//const char resource[] = "/TinyGSM/logo.txt";
-//
-//#include <TinyGsmClient.h>
-//#include <WiFi.h>
-//#include <esp_now.h>
-//
-//// Just in case someone defined the wrong thing..
-//#if TINY_GSM_USE_GPRS && not defined TINY_GSM_MODEM_HAS_GPRS
-//#undef TINY_GSM_USE_GPRS
-//#undef TINY_GSM_USE_WIFI
-//#define TINY_GSM_USE_GPRS false
-//#define TINY_GSM_USE_WIFI true
-//#endif
-//#if TINY_GSM_USE_WIFI && not defined TINY_GSM_MODEM_HAS_WIFI
-//#undef TINY_GSM_USE_GPRS
-//#undef TINY_GSM_USE_WIFI
-//#define TINY_GSM_USE_GPRS true
-//#define TINY_GSM_USE_WIFI false
-//#endif
-//
-//#ifdef DUMP_AT_COMMANDS
-//#include <StreamDebugger.h>
-//StreamDebugger debugger(SerialAT, SerialMon);
-//TinyGsm modem(debugger);
-//#else
-//TinyGsm modem(SerialAT);
-//#endif
-//
-//#ifdef USE_SSL
-//TinyGsmClientSecure client_satellite(modem);
-//const int port = 443;
-//#else
-//TinyGsmClient client_satellite(modem);
-//const int port = 80;
-//#endif
-//
-//TaskHandle_t Task1;
-//
-//void on_data_sent(const uint8_t *mac_addr, esp_now_send_status_t status)
-//{
-//	// go to sleep
-//}
-//
-//void on_data_recv(const uint8_t *mac, const uint8_t *incomingData, int len)
-//{
-//	// print mac
-//	Serial.print("Message recieved: Core ");
-//	Serial.println(xPortGetCoreID());
-//	for (int i = 0; i < 6; i++) {
-//		Serial.print(mac[i], HEX);
-//		Serial.print(":");
-//	}
-//	Serial.println();
-//	char data[len];
-//	memcpy(data, incomingData, len);
-//	Serial.println(data);
-//}
-//
-//[[noreturn]] void Task1code(void *parameter)
-//{
-//	Serial.println(xPortGetCoreID());
-//	WiFi.mode(WIFI_STA);
-//	Serial.println("ESPNow init");
-//	if (esp_now_init() != ESP_OK) {
-//		// initialization failed
-//		Serial.println("ESPNow init failed");
-//		// not sure about this
-//	}
-//	Serial.println("ESPNow init success");
-//	esp_now_register_recv_cb(on_data_recv);
-//
-//	while (true) {
-//	}
-//}
-//
-//void setup2()
-//{
-//	// Set console baud rate
-//	SerialMon.begin(115200);
-//	delay(10);
-//
-//	// !!!!!!!!!!!
-//	// Set your reset, enable, power pins here
-//	// !!!!!!!!!!!
-//
-//	SerialMon.println("Wait...");
-//
-//	xTaskCreatePinnedToCore(Task1code, /* Function to implement the task */
-//	                        "Task1",   /* Name of the task */
-//	                        10000,     /* Stack size in words */
-//	                        nullptr,   /* Task input parameter */
-//	                        0,         /* Priority of the task */
-//	                        &Task1,    /* Task handle. */
-//	                        0);        /* Core where the task should run */
-//
-//	// Set GSM module baud rate
-//	//	TinyGsmAutoBaud(SerialAT, GSM_AUTOBAUD_MIN, GSM_AUTOBAUD_MAX);
-//	modem.setBaud(9600);
-//	// SerialAT.begin(9600);
-//	delay(6000);
-//
-//	// Restart takes quite some time
-//	// To skip it, call init() instead of restart()
-//	SerialMon.println("Initializing modem...");
-//	modem.restart();
-//	// modem.init();
-//
-//	String modemInfo = modem.getModemInfo();
-//	SerialMon.print("Modem Info: ");
-//	SerialMon.println(modemInfo);
-//
-//#if TINY_GSM_USE_GPRS
-//	// Unlock your SIM card with a PIN if needed
-//	if (GSM_PIN && modem.getSimStatus() != 3) {
-//		modem.simUnlock(GSM_PIN);
-//	}
-//#endif
-//}
-//
-//void loop2()
-//{
-//#if TINY_GSM_USE_WIFI
-//	// Wifi connection parameters must be set before waiting for the network
-//	SerialMon.print(F("Setting SSID/password..."));
-//	if (!modem.networkConnect(wifiSSID, wifiPass)) {
-//		SerialMon.println(" fail");
-//		delay(10000);
-//		return;
-//	}
-//	SerialMon.println(" success");
-//#endif
-//
-//#if TINY_GSM_USE_GPRS && defined TINY_GSM_MODEM_XBEE
-//	// The XBee must run the gprsConnect function BEFORE waiting for network!
-//	modem.gprsConnect(apn, gprsUser, gprsPass);
-//#endif
-//
-//	SerialMon.print("Waiting for network...");
-//	if (!modem.waitForNetwork()) {
-//		SerialMon.println(" fail");
-//		delay(10000);
-//		return;
-//	}
-//	SerialMon.println(" success");
-//
-//	if (modem.isNetworkConnected()) {
-//		SerialMon.println("Network connected");
-//	}
-//
-//#if TINY_GSM_USE_GPRS
-//	// GPRS connection parameters are usually set after network registration
-//	SerialMon.print(F("Connecting to "));
-//	SerialMon.print(apn);
-//	if (!modem.gprsConnect(apn, gprsUser, gprsPass)) {
-//		SerialMon.println(" fail");
-//		delay(10000);
-//		return;
-//	}
-//	SerialMon.println(" success");
-//
-//	if (modem.isGprsConnected()) {
-//		SerialMon.println("GPRS connected");
-//	}
-//#endif
-//
-//	SerialMon.print("Connecting to ");
-//	SerialMon.println(server);
-//	if (!client_satellite.connect(server, port)) {
-//		SerialMon.println(" fail");
-//		delay(10000);
-//		return;
-//	}
-//	SerialMon.println(" success");
-//
-//	// Make a HTTP GET request:
-//	SerialMon.println("Performing HTTP GET request...");
-//	client_satellite.print(String("GET ") + resource + " HTTP/1.1\r\n");
-//	client_satellite.print(String("Host: ") + server + "\r\n");
-//	client_satellite.print("Connection: close\r\n\r\n");
-//	client_satellite.println();
-//
-//	uint32_t timeout = millis();
-//	while (client_satellite.connected() && millis() - timeout < 10000L) {
-//		// Print available data
-//		while (client_satellite.available()) {
-//			char c = client_satellite.read();
-//			SerialMon.print(c);
-//			timeout = millis();
-//		}
-//	}
-//	SerialMon.println();
-//
-//	// Shutdown
-//
-//	client_satellite.stop();
-//	SerialMon.println(F("Server disconnected"));
-//
-//#if TINY_GSM_USE_WIFI
-//	modem.networkDisconnect();
-//	SerialMon.println(F("WiFi disconnected"));
-//#endif
-//#if TINY_GSM_USE_GPRS
-//	modem.gprsDisconnect();
-//	SerialMon.println(F("GPRS disconnected"));
-//#endif
-//
-//	// Do nothing forevermore
-//	while (true) {
-//		delay(1000);
-//	}
-//}