| Name | Quantity | Price | Order Link | Comment |
|---|---|---|---|---|
| PTR5618 | 1 | 4.65$ | Taobao | BLE + MCU |
| SMD Tab CR2032 Battery Holder (SMD) | 1 | 0.24$ | AliExpress | |
| DPDT Switch | 1 | 0.16$ | AliExpress | |
| CR2032 Battery | 1 | 0.19$ | AliExpress | |
| SHT20 | Optional | 1.7$ | AliExpress | Temperature Sensor |
| Name | Quantity | Price | Order Link | Comment |
|---|---|---|---|---|
| PTR5618 | 1 | 4.65$ | Taobao | BLE + MCU |
| SMD Tab CR2032 Battery Holder (SMD) | 1 | 0.24$ | AliExpress | |
| DPDT Switch | 1 | 0.16$ | AliExpress | |
| CR2032 Battery | 1 | 0.19$ | AliExpress | |
| SHT20 | Optional | 1.7$ | AliExpress | Temperature Sensor |