Donate to support Open HardwareThe board detects a liquid it wakes up ESP8266, starts beeping, connects to a WiFi and send a MQTT message to a given server. It can be paired e.g. with Home Assistant to push a mobile notification. See a short demo.
Technical details
- dimensions 10x10cm
- power by 2xAA batteries via a boost converter
- current consumption in standby 30~40uA
- 2 water sensing loops (top & bottom)
Firmware & KiCad files
| Qty | Value | Device | Package | Parts | Description | MF | MPN | Aliexpress or Ebay link |
|---|---|---|---|---|---|---|---|---|
| 1 | ESP-12F | https://www.aliexpress.com/item/32339917567.html | ||||||
| 1 | 3.3V Boost DC DC Converter Board | DD0405MA | https://www.aliexpress.com/item/32802383877.html | |||||
| 1 | 2 AA SMD Battery Case | https://www.aliexpress.com/item/4000915211179.html | ||||||
| 5 | 10k | resistor | 0805 | https://www.aliexpress.com/item/33029877427.html | ||||
| 2 | 1k | resistor | 0805 | https://www.aliexpress.com/item/33029877427.html | ||||
| 2 | 10uF | capacitor | 0805 | https://www.aliexpress.com/item/4000002725720.html | ||||
| 1 | 0.1uF | capacitor | 0805 | https://www.aliexpress.com/item/4000002725720.html | ||||
| 1 | 2200uF | capacitor | THT | https://www.aliexpress.com/item/4000092084550.html | ||||
| 1 | BC327 | PNP transistor | THT | https://www.aliexpress.com/item/32856312651.html | ||||
| 2.54 pin male header | THT | https://www.aliexpress.com/item/32993182990.html | ||||||
| 2 | jumper cap | https://www.aliexpress.com/item/4000683311083.html | ||||||
| 1 | 3V buzzer | THT | https://www.aliexpress.com/item/33005016402.html |
| Name | Size | # Downloads |
|---|---|---|
| License.txt | 18.21 kB | 405 |
| leaky-B_Cu.gbr | 81.52 kB | 422 |
| leaky-B_Mask.gbr | 2.03 kB | 421 |
| leaky-B_Paste.gbr | 471 B | 456 |
| leaky-B_SilkS.gbr | 472 B | 464 |
| leaky-Edge_Cuts.gbr | 1.26 kB | 432 |
| leaky-F_Cu.gbr | 125.69 kB | 418 |
| leaky-F_Mask.gbr | 10.15 kB | 428 |
| leaky-F_Paste.gbr | 8.12 kB | 439 |
| leaky-F_SilkS.gbr | 88.21 kB | 443 |
| leaky-NPTH.drl | 365 B | 433 |
| leaky-PTH.drl | 1.89 kB | 447 |
| leaky-job.gbrjob | 2.61 kB | 440 |
| schematic.pdf | 77.09 kB | 619 |