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 | 122 |
| leaky-B_Cu.gbr | 81.52 kB | 145 |
| leaky-B_Mask.gbr | 2.03 kB | 163 |
| leaky-B_Paste.gbr | 471 B | 159 |
| leaky-B_SilkS.gbr | 472 B | 168 |
| leaky-Edge_Cuts.gbr | 1.26 kB | 150 |
| leaky-F_Cu.gbr | 125.69 kB | 142 |
| leaky-F_Mask.gbr | 10.15 kB | 139 |
| leaky-F_Paste.gbr | 8.12 kB | 172 |
| leaky-F_SilkS.gbr | 88.21 kB | 165 |
| leaky-NPTH.drl | 365 B | 156 |
| leaky-PTH.drl | 1.89 kB | 144 |
| leaky-job.gbrjob | 2.61 kB | 146 |
| schematic.pdf | 77.09 kB | 230 |