Absolutely noon on pi here.
I wanted to make a temperature logger with my raspberry Pi 3 and a "pt100 2 wire k type" thermocouple. I spent the evening googling about it and learned that one of the best way to do this would be through a max13865 board that communicates between the sensor and the board. But I'm for India and the board is exorbitantly costly to import and fakes on Amazon site has very poor review.
I also noticed there's a simpler approach discussed in raspberry help for DS18B20, which is a 3 wire configuration.
My question: 1. Is it possible to wire my 2 wire pt 100 to the pi3 without the max13865 in the middle? If yes can anyone help me with the wiring diagram.. 2. I'm trying to measure temperature between -70°c to 100°c. So will the waterproof DS18B20 work in such range?