From 7f11ca9691a58f721474a69c1e98b4b1c1178771 Mon Sep 17 00:00:00 2001
From: Moritz Perschke <moritz.perschke@uibk.ac.at>
Date: Thu, 21 Jul 2022 14:54:23 +0200
Subject: [PATCH] first running snippet espnow communication
---
code-snippets/espnow/espNowTest/.gitignore | 5 +
.../espnow/espNowTest/.vscode/extensions.json | 10 ++
.../espnow/espNowTest/.vscode/settings.json | 3 +
code-snippets/espnow/espNowTest/espnow.md | 20 +++
.../espnow/espNowTest/include/README | 39 ++++++
.../espnow/espNowTest/platformio.ini | 16 +++
code-snippets/espnow/espNowTest/src/main.cpp | 118 ++++++++++++++++++
code-snippets/espnow/espNowTest/test/README | 11 ++
8 files changed, 222 insertions(+)
create mode 100644 code-snippets/espnow/espNowTest/.gitignore
create mode 100644 code-snippets/espnow/espNowTest/.vscode/extensions.json
create mode 100644 code-snippets/espnow/espNowTest/.vscode/settings.json
create mode 100644 code-snippets/espnow/espNowTest/espnow.md
create mode 100644 code-snippets/espnow/espNowTest/include/README
create mode 100644 code-snippets/espnow/espNowTest/platformio.ini
create mode 100644 code-snippets/espnow/espNowTest/src/main.cpp
create mode 100644 code-snippets/espnow/espNowTest/test/README
diff --git a/code-snippets/espnow/espNowTest/.gitignore b/code-snippets/espnow/espNowTest/.gitignore
new file mode 100644
index 0000000..89cc49c
--- /dev/null
+++ b/code-snippets/espnow/espNowTest/.gitignore
@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch
diff --git a/code-snippets/espnow/espNowTest/.vscode/extensions.json b/code-snippets/espnow/espNowTest/.vscode/extensions.json
new file mode 100644
index 0000000..080e70d
--- /dev/null
+++ b/code-snippets/espnow/espNowTest/.vscode/extensions.json
@@ -0,0 +1,10 @@
+{
+ // See http://go.microsoft.com/fwlink/?LinkId=827846
+ // for the documentation about the extensions.json format
+ "recommendations": [
+ "platformio.platformio-ide"
+ ],
+ "unwantedRecommendations": [
+ "ms-vscode.cpptools-extension-pack"
+ ]
+}
diff --git a/code-snippets/espnow/espNowTest/.vscode/settings.json b/code-snippets/espnow/espNowTest/.vscode/settings.json
new file mode 100644
index 0000000..0db5873
--- /dev/null
+++ b/code-snippets/espnow/espNowTest/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+ "cmake.configureOnOpen": true
+}
\ No newline at end of file
diff --git a/code-snippets/espnow/espNowTest/espnow.md b/code-snippets/espnow/espNowTest/espnow.md
new file mode 100644
index 0000000..8928df7
--- /dev/null
+++ b/code-snippets/espnow/espNowTest/espnow.md
@@ -0,0 +1,20 @@
+# Esp Now Basic Steps
+
+- Define Mac address of receiving esp32
+- create a ```esp_now_peer_info_t```
+- define a function for sending/receiving
+
+ ```
+ setup(){
+ Serial.begin(115200);
+ while(!Serial); //open serial connection and wait
+ WiFi.mode(WIFI_STA); //enable wifi and set it to the correct mode
+ esp_now_init();
+ esp_now_register_send_cb(onDataSent);
+ esp_now_register_recv_cb(onDataRecv);
+ // fill out your esp_now_peer_info_t
+ esp_now_add_peer(peerInfo);
+ }
+ ```
+
+- Now you can send in your ```loop()```, or leave ```loop()``` empty to only receive
\ No newline at end of file
diff --git a/code-snippets/espnow/espNowTest/include/README b/code-snippets/espnow/espNowTest/include/README
new file mode 100644
index 0000000..194dcd4
--- /dev/null
+++ b/code-snippets/espnow/espNowTest/include/README
@@ -0,0 +1,39 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html
diff --git a/code-snippets/espnow/espNowTest/platformio.ini b/code-snippets/espnow/espNowTest/platformio.ini
new file mode 100644
index 0000000..65ef8ee
--- /dev/null
+++ b/code-snippets/espnow/espNowTest/platformio.ini
@@ -0,0 +1,16 @@
+; PlatformIO Project Configuration File
+;
+; Build options: build flags, source filter
+; Upload options: custom upload port, speed and extra flags
+; Library options: dependencies, extra library storages
+; Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:esp32-c3-devkitm-1]
+platform = espressif32
+board = esp32-c3-devkitm-1
+framework = arduino
+monitor_speed = 115200
+lib_deps = makuna/NeoPixelBus@^2.7.0
diff --git a/code-snippets/espnow/espNowTest/src/main.cpp b/code-snippets/espnow/espNowTest/src/main.cpp
new file mode 100644
index 0000000..3879284
--- /dev/null
+++ b/code-snippets/espnow/espNowTest/src/main.cpp
@@ -0,0 +1,118 @@
+#include <Arduino.h>
+#include <NeoPixelBus.h>
+#include <esp_now.h>
+#include "WiFi.h"
+
+#define PIN 8
+#define NUMPIXELS 1
+#define LED 0
+
+// uint8_t peerMAC[] = {0x58, 0xCF, 0x79, 0x04, 0x45, 0x9C}; //battery
+// uint8_t peerMAC[] = {0x58, 0xCF, 0x79, 0x04, 0x3A, 0xF8}; //wired
+uint8_t peerMAC[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+
+typedef struct espMessage{
+ String macAddr;
+ int temp;
+ int co;
+} espMessage;
+
+espMessage lastMessage;
+
+esp_now_peer_info_t peerInfo;
+
+NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> led(NUMPIXELS, PIN);
+
+void blink()
+{
+ // RgbColor current = led.GetPixelColor(0);
+ // if(current == RgbColor(0,0,0)){
+ // led.SetPixelColor(LED, RgbColor(55, 55, 55));
+ // led.Show();
+ // Serial.println("Led is on at peer" + WiFi.macAddress());
+ // }
+ // else{
+ // led.SetPixelColor(LED, RgbColor(0,0,0));
+ // led.Show();
+ // Serial.println("led is off");
+ // }
+}
+
+void flash(RgbColor color){
+ led.SetPixelColor(LED, color);
+ led.Show();
+ delay(500);
+ led.SetPixelColor(LED, RgbColor(0,0,0));
+ led.Show();
+}
+
+void onDataSent(const uint8_t *mac_addr, esp_now_send_status_t status)
+{
+ Serial.println(status == ESP_NOW_SEND_SUCCESS ? "Message recieved" : "Message lost");
+ flash(RgbColor(255, 255, 255));
+}
+
+void onDataRecv(const uint8_t *mac, const uint8_t *incomingData, int len)
+{
+ Serial.println("message recieved");
+ memcpy(&lastMessage, incomingData, sizeof(lastMessage));
+ Serial.println(lastMessage.macAddr);
+ Serial.println(lastMessage.co);
+ Serial.println(lastMessage.temp);
+ Serial.println("--------------");
+}
+
+void setup() {
+ // put your setup code here, to run once:
+ Serial.begin(115200);
+ while (!Serial);
+
+ //Led stuff
+ led.Begin();
+ led.SetPixelColor(LED, RgbColor(0,0,0));
+ led.Show();
+
+ //esp now
+ WiFi.mode(WIFI_STA);
+ if(esp_now_init() != ESP_OK){
+ Serial.println("Error initializing espnow");
+ flash(RgbColor(0, 0, 55));
+ return;
+ }
+
+ //comment out whichever you don't need
+ esp_now_register_send_cb(onDataSent);
+ // esp_now_register_recv_cb(onDataRecv);
+
+ //register peer
+ memcpy(peerInfo.peer_addr, peerMAC, sizeof(peerMAC));
+ peerInfo.channel = 0;
+ peerInfo.encrypt = false;
+ if (esp_now_add_peer(&peerInfo) != ESP_OK){
+ flash(RgbColor(0, 55, 55));
+ return;
+ }
+
+
+}
+
+void loop() {
+ // put your main code here, to run repeatedly:
+
+ //comment this out if you only want to recieve
+ espMessage data;
+ data.macAddr = WiFi.macAddress();
+ data.co = (int) random(5,30);
+ data.temp = (int) random(0,100);
+
+ esp_err_t result = esp_now_send(peerMAC, (uint8_t *) &data, sizeof(data));
+ if(result == ESP_OK){
+ flash(RgbColor(0, 55, 0));
+ }
+ else{
+ flash(RgbColor(55, 0, 0));
+ Serial.println(result);
+ }
+
+ delay(5000);
+}
\ No newline at end of file
diff --git a/code-snippets/espnow/espNowTest/test/README b/code-snippets/espnow/espNowTest/test/README
new file mode 100644
index 0000000..9b1e87b
--- /dev/null
+++ b/code-snippets/espnow/espNowTest/test/README
@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html
--
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