I am trying to connect 2 relay modules to core module. In the core module i have firmware bcf-generic-node-power-module-rgbw72. I need to remotelly control gate and door. One relay response on node/{node-id}/relay/0:0/pulse/set but i do not know how to control second relay. I have tried this mqtt, node/{node-id}/relay/0:1/pulse/set but nothing happens. Do I need patch firmware or is there another way how to pulse second relay?
Thanks
Hi, to control two Relay Modules you need to change I2C address of the second Relay Module: Remove the 0R resistor on the left and place it to alternative position on the right (or just shortcut pads with solder):
Hello,
I add reference to the documentation.
Here is the example code how to write firmware to control Relay Module.
https://www.bigclown.com/doc/firmware/how-to-relay-module/
In that code is the bc_relay_module_init address 0x3B, when you resolder that zero ohm resistor then you set alternate I2C address 0x3F.
The address space of I2C can be found here https://www.bigclown.com/doc/hardware/i2c-address-space/
Let us know if you need more help.
Martin
