Created
September 14, 2015 19:51
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esp8266_mqtt_bluemix
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/* | |
You'll need the information below, get these after adding a device. I'm using the MAC address as the device's ID. | |
org=[org-id] | |
type=[device-type] | |
id=[device-id] | |
auth-method=token | |
auth-token=[auth-token] | |
*/ | |
#include <PubSubClient.h> | |
#include <ESP8266WiFi.h> | |
String orgId = "[org-id]"; | |
String deviceType = "[device-type]"; | |
String deviceId = [device-id]"; | |
String authToken = "[auth-token]"; | |
const char* ssid = "********"; | |
const char* password = "********"; | |
// Replace [event-id] with any event id of your choice. | |
char* topic = "iot-2/evt/esp8266tout/fmt/json"; | |
String server = orgId + ".messaging.internetofthings.ibmcloud.com"; | |
WiFiClient wifiClient; | |
PubSubClient client((char*)server.c_str(), 1883, callback, wifiClient); | |
void callback(char* topic, byte* payload, unsigned int length) { | |
// handle message arrived | |
} | |
String macToStr(const uint8_t* mac) | |
{ | |
String result; | |
for (int i = 0; i < 6; ++i) { | |
result += String(mac[i], 16); | |
if (i < 5) | |
result += '-'; | |
} | |
return result; | |
} | |
void setup() { | |
Serial.begin(115200); | |
delay(10); | |
Serial.println(); | |
Serial.println(); | |
Serial.print("Connecting to "); | |
Serial.println(ssid); | |
WiFi.begin(ssid, password); | |
while (WiFi.status() != WL_CONNECTED) { | |
delay(500); | |
Serial.print("."); | |
} | |
Serial.println(""); | |
Serial.println("WiFi connected"); | |
Serial.println("IP address: "); | |
Serial.println(WiFi.localIP()); | |
// Generate client name based on MAC address and last 8 bits of microsecond counter | |
String clientName; | |
// uint8_t mac[6]; | |
// WiFi.macAddress(mac); | |
// clientName = " | |
clientName += "d:"; | |
clientName += orgId + ":"; | |
clientName += deviceType + ":"; | |
clientName += deviceId; | |
Serial.print("Connecting to "); | |
Serial.print(server); | |
Serial.print(" as "); | |
Serial.println(clientName); | |
if (client.connect((char*) clientName.c_str(), "use-token-auth",(char*) authToken.c_str())) { | |
Serial.println("Connected to MQTT broker"); | |
Serial.print("Topic is: "); | |
Serial.println(topic); | |
} | |
else { | |
Serial.println("MQTT connect failed"); | |
Serial.println("Will reset and try again..."); | |
abort(); | |
} | |
} | |
void loop() { | |
static int counter = 0; | |
int adc = 0; | |
adc = analogRead(A0); | |
// Bluemix requires root level | |
String payload = "{\"d\": {\"micros\":"; | |
payload += micros(); | |
payload += ",\"counter\":"; | |
payload += counter; | |
payload += ",\"adc\":"; | |
payload += String(adc); | |
payload += "}}"; | |
if (client.connected()){ | |
Serial.print("Sending payload: "); | |
Serial.println(payload); | |
if (client.publish(topic, (char*) payload.c_str())) { | |
Serial.println("Publish ok"); | |
} | |
else { | |
Serial.println("Publish failed"); | |
} | |
} else { | |
Serial.println("Client not connected. Will reset and try again."); | |
abort(); | |
} | |
++counter; | |
delay(1000); | |
} |
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