Dash project to demonstrate toggling an LED on an ESP32 development board. Details about Dash and how it works are available here: https://dashio.io/
This project has the following features:
- Tapping a Button/Indicator control on the Dash IoT app toggles an LED on the ESP32 and increments a counter.
- The counter value is displayed in a TextBox control on the **Dash IoT ** app.
- Communicates via BLE and dash MQTT connections.
- Uses LED on pin 13, but can be changed as required.
- Uses the serial monitor to show what is going on (115200 baud).
Before you begin, make sure you have the following:
- An ESP32 dev board with LED on pin 13.
- Arduino IDE with the arduino-dashio library installed, available on GitHub.
- Using the BLE connection is free. To make use of the dash MQTT connecction, you will need a dash account and subscription, which you can create on the Dash app.
- The Dash IoT app is available here:
| Apple | Android |
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Install and run the code below in your ESP32. On the Dash IoT app, search for the device named "Toggle Button" as follows: 'All Devices' -> 'Find New Device' -> 'BLE Scan'
#include "DashioESP.h"
const char configC64Str[] PROGMEM =
"lVPbctowEP0VRq/1NFzTJm/4EqAYQ2yVdKb0wRdha2IkRpa5hOHfu5LthITmoaNhOOweLdqze07INV10//uPgabe3KxQ4Np+hbDz"
"CwM6obKkCbpH0Rc7zV5+7Pz9rT2kq5vBrp867BEZKOZMCp5PbGDhdgci21AQJnXAXqpAyags4BdASWVOFFN/GygjNM2kH0rK0X37"
"a2egTk1b8IJCnAHdm3uOuk0OcpjTVIUsx8OOD8E1F5tQvpGOzb2rqltBYlroim0DPUcJPm7J28U9TWT2eqnf/T741jHQ4aqcTvSh"
"85wXZBolcxYQBiJJUZIzaGdPahFnw0UNHO9nhdz5qALDpd1obuGab7k1sJfLJ61+IY9aLnMYTCwlthT5LDw8gOYBfYFMpwudpIIm"
"Fs/LDQOVu/DmIoMRVJHqWQZi5eaV0nk/tWpIqrTJRUIE8LhQf5qH8XOTeU5Z0iSeMipJnfiUjEXICr0K8VHrHdfMUUhZEXHBL9ah"
"vqi3wuSHpugsFBym9T55VVi17/M9NNbrXVAvRLo1EIWOvXCjx80ZQdWghrUFrLGP68Uf+YtxBU2MvUsPOPt59hDfRsHUWt3EZHWz"
"dLuDhatM0MxpPBmNXfhgiPH1uunDppvWSITHD3YxtV2iUkrOHBZGOUmacXH2qgFJaLlpBXkoScvMS/Ivh32wUa8N59psn7jq2jC9"
"O3Uqv1XT+V9vXMjtqqe1zDKPtOgmHtWusB7ACyeUkB2NSUBkuVXtPmJsmK56F6ysrXNLSvb12q5Tn+wAns9/AQ==";
char WIFI_SSID[] = "yourWiFiSSID";
char WIFI_PASSWORD[] = "yourWiFiPassword";
char MQTT_USER[] = "yourMQTTuserName";
char MQTT_PASSWORD[] = "yourMQTTpassword";
int ledPin = 13;
const char *BUTTON_ID = "B01";
const char *TEXT_BOX_ID = "T01";
DashDevice dashDevice("ESP32_Type", configC64Str, 1);
DashBLE ble_con(&dashDevice, true);
DashMQTT mqtt_con(&dashDevice, true, true);
DashWiFi wifi;
bool buttonValue = false;
int counter = 0;
void sendMessage(const String& message) {
// Send all messages through both connections in this simple example.
ble_con.sendMessage(message);
mqtt_con.sendMessage(message);
}
void sendData() {
String message = dashDevice.getButtonMessage(BUTTON_ID, buttonValue);
message += dashDevice.getTextBoxMessage(TEXT_BOX_ID, String(counter));
sendMessage(message);
}
void processButtonPress() {
counter += 1;
buttonValue = !buttonValue;
digitalWrite(ledPin, buttonValue);
sendData();
}
void processIncomingMessage(MessageData *messageData) {
switch (messageData->control) {
case status:
sendData();
break;
case button:
if (messageData->idStr == BUTTON_ID) {
processButtonPress();
}
break;
}
}
void setup() {
pinMode(ledPin, OUTPUT);
Serial.begin(115200);
delay(1000);
dashDevice.setup(wifi.macAddress(), "Toggle Button"); // unique deviceID, and device name
mqtt_con.setup(MQTT_USER, MQTT_PASSWORD);
mqtt_con.setCallback(&processIncomingMessage);
wifi.attachConnection(&mqtt_con);
wifi.begin(WIFI_SSID, WIFI_PASSWORD);
ble_con.setCallback(&processIncomingMessage);
ble_con.begin();
}
void loop() {
wifi.run();
ble_con.run();
}