Hi, I want to use my Raspberry Pi to control the pH of the water in my tank. I have followed the online tutorial using an Arduino which showed that the pumps work, but I want to do it all through the Pi using Node Red because I already use it to control water height, pumps and lighting. I know that I2c works in some capacity because I use a 4-20 mA ads1115 sensor to interpret the 4-20 mA signal coming from the pH transmitter.
The pumps are wired into the SCL and SDA GPIO pins of the Pi and getting Vcc from a power supply which has common ground with the Pi, the same way as the ads1115.
I am trying to use node-red-contrib-ezo but I'm really not sure how to use it correctly. I have tried using an inject node with
into the ezo node by trying to follow some of what is discussed here https://github.com/MaddyTP/node-red-contrib-ezo/issues/7/
I have also tried inserting a boolean true into the ezo node with D,[1] as the topic. With both I keep getting the error "Error: EREMOTEIO: remote I/O error, write"
I am not really sure if that means it's an issue with my wiring or with what I've done on node red.
Please can anyone help me
Thanks
Cai
The pumps are wired into the SCL and SDA GPIO pins of the Pi and getting Vcc from a power supply which has common ground with the Pi, the same way as the ads1115.
I am trying to use node-red-contrib-ezo but I'm really not sure how to use it correctly. I have tried using an inject node with
I have also tried inserting a boolean true into the ezo node with D,[1] as the topic. With both I keep getting the error "Error: EREMOTEIO: remote I/O error, write"
I am not really sure if that means it's an issue with my wiring or with what I've done on node red.
Please can anyone help me
Thanks
Cai
