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Water flood (leak) sensor Based on Nordic Semiconductor nRF52840 module E73-2G4M08S1C from Ebyte. Board size and shape adopted to case of water flood sensor EW70_433 (EV1527) from Shenzhen Kaipule Technology Co., Ltd.

Power source provided by one CR2450 coin battery. In depend on firmware there is can support for Bluetooth 5, Bluetooth mesh, Thread, Zigbee, 802.15.4, ANT and 2.4 GHz proprietary stacks. Board has two independent probes for water sensing, button for mode selection and LED for indication. There are also SWD interface pins for firmware upload and debugging.

Sensor image






ID Name Designator Footprint Quantity
1 E73_2G4M08S1C U1 E73_2G4M08S1C.1 1
2 IRLML2402TRPBF Q1,Q2 SOT-23(SOT-23-3) 2
3 62 R1 0603 1
4 Header-Male-2.54_1x4 P4 DIP-1X4P-2.54MM-M 1
5 3.3M R3,R2 0603 2
6 32.768KHz X1 OSC-SMD_L3.2-W1.5 1
7 Probe_1 P1 HDR-1X1/2.54 1
8 Probe_2 P2 HDR-1X1/2.54 1
9 Probe_3 P3 HDR-1X1/2.54 1
10 CR2450 B2 BS-2450-2SMT 1
11 12pF C1,C2 0603 2
12 47uF C3 1206 1
13 KLS7_TS3611 SW1 SWITCH_KLS7-TS3611 1
14 1uF C5,C6 C0603 2
15 100nF C4 C0603 1
16 100K R4,R5 R0603 2
17 19-21SURC/S530-A2/TR8 LED1 LED0603-RD 1


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