I would like to build a custom PCB for my projet using an Arduino Pro Mini and and BME280 pressure sensor.
So far I could found most answer on Google but there are two finds left.
- I want to connect to the Arduino using UBS (and not have to solder some headers). How do I connect the Arduino to the UBS ?
- VBus goes to 5V
- GND to ground
- All EH to ground too
- But what about D- /D+ and ID ? More specifically where do I connect arduino TX, RX and RESET ?
The soldering pads of the BME280 chip are underneath the chip which makes it impossible to use "traditionnal" soldering. I therefore need to use solder paste and heat it with a some heatplate right ? (or bake it in an oven ?!)
Bosch Sensortec | Bosch Sensortec BME280 | Humidity Sensors/Temperature and Humidity Sensors - LCSC.COM
Regarding the BME280 chip, is there any way to make it waterproof and still be fonctionnal ? I suppose that the small hole on the chip is where it measure the pressure and make it waterproof would complety ruin it right ? For context it will not go underwater but me projet might fall in water.
The projet will also contain a LI-PO charger (using a tp4056) and a boost convert (to boost from 4.2 v to 5 volts). I therefore use a 22uF coil. There's not polarity right ?
3L COILS | 3L COILS SMTDR43-220M | Power Inductors - LCSC.COM
Thanks in advance for your time and your help.