exp625 / hb-sen-bme280_exp625

HB-SEN-BME280_EXP625

PCB for DIY AsksinPP++ Temperature/Humidity/Pressure sensor based on a BOSCH BME280 sensor and an Arduino Pro Mini

Credits

• This PCB is derived from FUEL4LP's PCB HB-UNI-SEN-BATT_FUEL4EP and HB-UNI-SEN-BATT_ATMega1284P_E07-868MS10_FRAM_FUEL4EP .

Changes

• Smaller PCB footprint to fit into the CBRS02VWH case
• surface mount assembly of the arduino and c1101 module to save space
• specific to one bme280 chip, everything else removed
• additional reset button, because the onboard reset button of the arduino needs to be removed due to the height.

Hands-on test

The provided gerber files were used to order the pcb from JLCPCB and assemble 4 sensors, which are working perfectly for some time now

Part List

Count	Part	Label
1	IRLU024N	Q1
2	Resistor 100 kOhm	R1,R5
1	Resistor 470 Ohm	R2
2	Resistor 10 kOhm	R3,R4
1	Resistor 220 kOhm	R6
1	10uF RM 1.5	C1
3	6 Pin Jumper 2.54mm	J1, J2, J3
2	Battery Holder 6S-AA	BT1, BT2
1	Arduino Pro Mini	U1
1	C1101 RF Module	U2
1	BME280 3.3V Devboard	U3
1	Red 3mm LED	D1
2	Button 6x6mm	SW1,SW2

Remove onboard leds, button and voltage regulator from the arduino board.