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things4u / LoRa-Thing

Make one or more Things as a PoC for LoRa
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HTU21 sensor pullup resistor on SDA. #1

Open janisalnis opened 6 years ago

janisalnis commented 6 years ago

Hi! I connected HTU21 sensor board from Ebay to Arduino node and the programm hanged or gave wrong sensor values. Needed to add a pullup 10k resistor to 5V on SDA in schematics. That helped.

janisalnis commented 6 years ago

I alsho had to supply the HTU21 board from 5V as it has onboard regulator and if supplied from 3.3V then after the LDO voltage is lower and temperature values are wrong.