Send data from cayenne to arduino possible ?!

Community Help With My Project
21

yes, uso tranquillamente cayenne da anni,per conferma ho provato ha inserire tutto sul’ hardware nuovo e cmq fuziona con la prova base che hai dato ora

22

you mean, it works with pubsub also?

23

no con pubsub no

24

ho provato anche ad aprire le porte sul router ,ma niente

25

the port is not the issue here, as cayenne library code works.
Can you try this code and connect to any other MQTT broker pubsubclient/mqtt_esp8266.ino at master · knolleary/pubsubclient · GitHub

26

gia fatto, e fuzniona, mi dice che stampa

27

i did not get what you meant by above.

28

having done the test you posted to me, it works

29

which broker did you connect to?

30
31

can you join me on http://slack.mydevices.com/

32

solved, my problem is that I inserted the device as GENERIC ESP8266 instead it must be inserted as ARDUINO GENUINO

33

You mean, while adding a new device, you needed to select a arduino device?

34

yes, if you don’t select an arduino device the sending won’t work with the sketch you gave me

35

Strange, anyways great debug.

36

technical question, in the schetch there is the payload variable that gives me the value I ask for. how do i get it out? that is, it comes out for example “temp, c = 22.0”
miserve insert this into a variable and send it
but I don’t understand the byte payload variable with for loop how to manipulate it

37 
char buff[10];
void mqttCallback(char* topic, byte* payload, unsigned int length) {
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
    // Show the received message "stream" in the serial monitor.
    Serial.print((char)payload[i]);
    buff[i] = (char)payload[i];
  }
  Serial.println();
  Serial.print("buff:");
  Serial.print(buff);
  }
38

Hello
I don’t understand this command well:
#define MQTT_TOPIC_BTN_ONOFF “v1 /” MQTT_USERNAME “/ things /” CLIENT_ID_SUB “/ data / 2”
My idea is to connect to my my Cayenne slate with a second esp8266 to read the temperature data that a first esp8266 is sending and be able to physically display it on a display that is geographically located in another place than the sensor
With “v1 /” you mean the viertual channel 1 and u mean the first esp8266?
Could you explain that command to me
Thanks in advance

39

v1 means the version 1 of the cayenne MQTT API.