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 | AliExpress: 33valuesX 20pcs=660pcs 0603 0805 1206 Resistor K... | ||||
| 2 | 1k | resistor | 0805 | AliExpress: 33valuesX 20pcs=660pcs 0603 0805 1206 Resistor K... | ||||
| 2 | 10uF | capacitor | 0805 | AliExpress: 0805 1206 SMD Ceramic capacitor kit 10PF to 22UF... | ||||
| 1 | 0.1uF | capacitor | 0805 | AliExpress: 0805 1206 SMD Ceramic capacitor kit 10PF to 22UF... | ||||
| 1 | 2200uF | capacitor | THT | AliExpress: High Frequency Low ESR Aluminum Capacitor 20% 10... | ||||
| 1 | BC327 | PNP transistor | THT | AliExpress: BC337 BC327 2N2222 2N2907 2N3904 2N3906 S8050 S8... | ||||
| 2.54 pin male header | THT | AliExpress: 10pcs 40 Pin 1x40 Single Row Male And Female 2.5... | ||||||
| 2 | jumper cap | AliExpress: 50pcs Jumper Cap 2.54mm Pitch Pin Header Connect... | ||||||
| 1 | 3V buzzer | THT | https://www.aliexpress.com/item//33005016402.html |
| Name | Size | # Downloads |
|---|---|---|
| License.txt | 18.21 kB | 14 |
| leaky-B_Cu.gbr | 81.52 kB | 12 |
| leaky-B_Mask.gbr | 2.03 kB | 13 |
| leaky-B_Paste.gbr | 471 B | 11 |
| leaky-B_SilkS.gbr | 472 B | 14 |
| leaky-Edge_Cuts.gbr | 1.26 kB | 14 |
| leaky-F_Cu.gbr | 125.69 kB | 15 |
| leaky-F_Mask.gbr | 10.15 kB | 14 |
| leaky-F_Paste.gbr | 8.12 kB | 14 |
| leaky-F_SilkS.gbr | 88.21 kB | 14 |
| leaky-NPTH.drl | 365 B | 13 |
| leaky-PTH.drl | 1.89 kB | 14 |
| leaky-job.gbrjob | 2.61 kB | 14 |
| schematic.pdf | 77.09 kB | 47 |