2017-01-17, 12:25 PM
I think the easiest solution is to get it into the node-red via the serialport and convert the signals from there.
I have ordered a Victron Energy MTTP regulator for my solarpanels, this regulator also have the possibility to connect to an Ras-pi, so hopefully I can extract the datas I need from that to my 12v system. If not I will do the same as you and use and arduino.
For now I have a sketch that reads diesel level, water level and waste level. If I set ut to update to fast the readings are floating. This is because the arduino only have one ADC and get unstable when switching pin to read.
Therefor I now read every sensor two times and discard the first reading.
I will also look in maybe use one arduino for each sensor if that makes it more stable. (They are so cheap so doesnt matter how many you use
).
I havent testet yet, but if you connect more than one arduino to the ras-pi. Will it not just get new names? like ttyUSB1, ttyUSB2 etc?
If so, when you import the arduino to node-red you choose wich port you want it to listen to, so in my mind I think you can have as many as you want..
(Have 5xarduino on the way by mail so will test this as soon as they arrive).
I have ordered a Victron Energy MTTP regulator for my solarpanels, this regulator also have the possibility to connect to an Ras-pi, so hopefully I can extract the datas I need from that to my 12v system. If not I will do the same as you and use and arduino.
For now I have a sketch that reads diesel level, water level and waste level. If I set ut to update to fast the readings are floating. This is because the arduino only have one ADC and get unstable when switching pin to read.
Therefor I now read every sensor two times and discard the first reading.
I will also look in maybe use one arduino for each sensor if that makes it more stable. (They are so cheap so doesnt matter how many you use
).I havent testet yet, but if you connect more than one arduino to the ras-pi. Will it not just get new names? like ttyUSB1, ttyUSB2 etc?
If so, when you import the arduino to node-red you choose wich port you want it to listen to, so in my mind I think you can have as many as you want..
(Have 5xarduino on the way by mail so will test this as soon as they arrive).