Using Arduino DI/O for Alarmo binary sensors with MQTT discovery

Ramdough1 · May 6, 2024, 12:59pm

Ok, this should all work, but I must be missing something.

I am a bit of a newby….but please help.

I have copied this code directly but updated the MAC address, IP number, and unique ID (so it stood out more). My code compiles and writes to the arduino successfully.

github.com

dawidchyrzynski/arduino-home-assistant/blob/1d333ab229b2dcefedf1b51e033f2177b74fca8c/examples/binary-sensor/binary-sensor.ino

#include <Ethernet.h>
#include <ArduinoHA.h>

#define INPUT_PIN       9
#define BROKER_ADDR     IPAddress(192,168,0,17)

byte mac[] = {0x00, 0x10, 0xFA, 0x6E, 0x38, 0x4A};
unsigned long lastReadAt = millis();
bool lastInputState = false;

EthernetClient client;
HADevice device(mac, sizeof(mac));
HAMqtt mqtt(client, device);

// "myInput" is unique ID of the sensor. You should define you own ID.
HABinarySensor sensor("myInput");

void setup() {
    pinMode(INPUT_PIN, INPUT_PULLUP);
    lastInputState = digitalRead(INPUT_PIN);

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I can see my Arduino and ping it on the network.

Under MQTT on HA, I am able to publish to myself using the manual publish and listen feature. I have listen set to #, so I am listening to all traffic. So mosquito appears to be working. Discovery is on.

For some reason, I do not get a new sensor created using this code.

What should I try next?

Ramdough1 · May 8, 2024, 11:08pm

Anyone have any ideas? I am assuming the simplicity of this code should work and I am concerned with adding to it until it works on a basic level. Other examples are similar so I am guessing I have a mistake or missing component or setting.

Thoughts?

Ramdough1 · May 15, 2024, 2:36pm

Anyone willing to help here? I am guessing the fix is simple.