Quantity   Component name
1 × BME BME280, output signal Digital Signal; power supply 3.3-5.5V DC
1 × K1 – Hot Water Relay OMRON PCB Power Relay – G5LE contact rating 125VAC @ 10 AMP / 30VDC @ 8 AMP; switching circuit SPDT; packag
1 × R2 1.2kΩ Resistor tolerance ±5%; package 1206 [SMD]; resistance 1.2kΩ
1 × J1 RaspberryPi Zero or Zero W Any version
1 × K2 – Heating Relay OMRON PCB Power Relay – G5LE contact rating 125VAC @ 10 AMP / 30VDC @ 8 AMP; switching circuit SPDT; package
1 × H Humidity contact Unprotected I/O. Do not connect directly to a relay!
1 × U1 Power supply HLK-PM01
1 × D1 Rectifier Diode type Rectifier; package Melf DO-213 AB [SMD]; part # 1N4001
1 × D2 Rectifier Diode type Rectifier; package Melf DO-213 AB [SMD]; part # 1N4001
1 × Q1 PNP-Transistor type PNP; package SOT-23 [SMD]; part # 2N2222
1 × Q2 PNP-Transistor type PNP; package SOT-23 [SMD]; part # 2N2222
1 × R1 1.2kΩ Resistor tolerance ±5%; package 1206 [SMD]; resistance 1.2kΩ