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TwinNode: Low-Power Water Level Monitor

MAATHES-THILAK-K·TWIN-NODE·TWIN NODE V2.0/TWIN_NODE.kicad_pcb

TwinNode: Low-Power Water Level Monitor PCB layout, top view — open source ESP8266 board by MAATHES-THILAK-K

About the TwinNode: Low-Power Water Level Monitor PCB

TwinNode: Low-Power Water Level Monitor is an open source ESP8266 PCB design by MAATHES-THILAK-K, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 44.3 × 41.9 mm, with 33 components from 21 distinct parts.

Its main chip is the ESP-12F, from the ESP8266 family. Other key parts include the RT9080-33GJ5, TP4056-42-ESOP8 and DW01A. By type, the board carries 11 resistors, 9 capacitors, 5 connectors, 4 ICs, 1 transistor and 1 switch.

It belongs with the power & battery, iot & wireless and sensors designs in this gallery.

From the project

ESP-NOW based solar-powered water level monitoring system for overhead tanks. An outdoor ESP8266 node uses a waterproof ultrasonic sensor to measure water level and transmits data wirelessly without internet. Designed for ultra-low power, outdoor reliability, and real-world deployment.

TWIN NODE V2.0 is the fabricated and tested hardware revision of the low-power ESP-NOW water level monitoring system. This version incorporates real-world fabrication feedback, improving reliability and simplifying the design for future revisions.

All components are sourced from ROBU.IN.

Mounting holes: Increased from 3 to 4 for better casing support I2C expanders: Removed, no longer required Programming & power connections: Female headers replaced with JST connectors Component placement: Fully optimized for aesthetic and practical routing PCB traces: Increased width to support longer…

TwinNode: Low-Power Water Level Monitor, from the project README
From the project README

Main components on the TwinNode: Low-Power Water Level Monitor

RT9080-33GJ5ESP-12FTP4056-42-ESOP8DW01A

TwinNode: Low-Power Water Level Monitor bill of materials (BOM)

33 components, 21 distinct parts.

QtyPartRefs
1
RT9080-33GJ5
IC1
1
ESP-12F
U1
1
TP4056-42-ESOP8
U2
1
DW01A
U3
1
FS8205A
Q1
1
01x06
J1
2
01x04
J2, J4
2
01x02
J3, J5
1
BOOT
SW1
1
SI2301CDS-T1-GE3
T1
1
LED_BLUE
D1
5
10uf
C1, C2, C4, C8, C9
1
100uf
C3
1
0.1uF
C5
1
100uF
C6
1
100nF
C7
2
1k
R1, R10
1
2k
R2
6
12k
R3, R5, R6, R7, R8, R11
1
100
R4
Show 1 more
QtyPartRefs
1
47k
R9

TwinNode: Low-Power Water Level Monitor design files

The KiCad project lives in the MAATHES-THILAK-K/TWIN-NODE repository on GitHub; these links point at the commit this page was built from.

TwinNode: Low-Power Water Level Monitor: common questions

What microcontroller does the TwinNode: Low-Power Water Level Monitor use?

The TwinNode: Low-Power Water Level Monitor is built around the ESP-12F, from the ESP8266 family.

How big is the TwinNode: Low-Power Water Level Monitor PCB?

The TwinNode: Low-Power Water Level Monitor measures 44.3 × 41.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the TwinNode: Low-Power Water Level Monitor?

33 components, from 21 distinct parts. The full bill of materials is listed on this page.

Where can I download the TwinNode: Low-Power Water Level Monitor design files?

From the MAATHES-THILAK-K/TWIN-NODE repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the TwinNode: Low-Power Water Level Monitor design in my own project?

Yes, under the terms of its Apache-2.0 license, which MAATHES-THILAK-K chose for the repository.

Can I test firmware for the TwinNode: Low-Power Water Level Monitor without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.

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