Recommend digital temp sensors on Mangoh Red?


#1

I’m interested to get some experience with Mangoh Red and locally simultaneous connect&use 4 digital temperature sensors (I want to avoid using analog thermistors)
Can anyone recommend ext temp sensors e.g. SPI based DS18B20 and has drivers etc already working?
thnx for sharing!


#2

It seems that the DS18B20 is a 1-Wire (not SPI) sensor. Were you thinking of a different sensor?


#3

Thnx for your response!
My objective is to connect 4 temp sensors which are approx. 50cm wired close to the mangOH Red.
To avoid need of calibration I thought to use sensors with digital output. My initial thoughts were to use spi, but I understand now that the spi-bus cannot have external sensors connected with 1 m wires.
An alternative like rs485 makes it more complex so, I guess for this proof-of-concept I’ll use ADC based thermistors and end-up playing around in the kitchen with ice and boiling water to calibrate :wink:
Keep it simple. Agree or any other suggestions?


#4

That should be fine. Uart and spi won’t run over wires so those are out. I haven’t tried i2c based ones on wires but you can give it a try. We have tried adc over that length as was fine. Make sure the max adc is not more than 1.8v.