HardLabs

Tanklevel

Th3Link·tanklevel

Tanklevel PCB layout, top view — open source ESP32 board by Th3Link

About the Tanklevel PCB

Tanklevel is an open source ESP32 PCB design by Th3Link, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 70 × 60 mm, with 68 components from 27 distinct parts.

Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the LAN8720A and MCP3221. By type, the board carries 35 resistors, 23 capacitors, 5 diodes, 3 ICs, 1 fuse and 1 inductor.

It belongs with the iot & wireless designs in this gallery.

From the project

This project provides a solution for measuring the liquid level in tanks, such as rainwater tanks, using the TL-136 pressure sensor. It is designed for easy integration with home automation systems, connecting via Wi-Fi or Ethernet.

This project provides a solution for measuring the liquid level in tanks, such as rainwater tanks, using the TL-136 pressure sensor. It is designed for easy integration with home automation systems, connecting via Wi-Fi or Ethernet.

- Measures liquid levels in tanks accurately using the TL-136 sensor. - Connectivity: Wi-Fi or Ethernet for integration with smart home systems. - Compact design to fit in a 3-way IP68 junction box (minimum inner dimensions: 90 × 110 mm). - PCB target size: 80 × 60 mm. - Powered by a 24V supply, e.g., MEAN WELL APV-8-24 (8W).

Main components on the Tanklevel

LAN8720AESP32-WROOM-32MCP3221

Tanklevel bill of materials (BOM)

68 components, 27 distinct parts.

QtyPartRefs
1
LAN8720A
U5
1
ESP32-WROOM-32
U6
1
MCP3221
U7
1
1A
F1
1
BAT54S
D1
1
SS34
D2
1
SMF24A
D4
2
LED
D5, D6
1
BLM18KG331SH1D
FB2
9
100n
C1, C4, C6, C13, C17, C19, C21, C24 +1
5
1u
C2, C7, C9, C20, C29
1
4u7
C3
3
10u
C5, C12, C26
1
4u7
C22
1
10u
C23
1
47u
C27
1
470p
C28
1
20n
C30
1
165R
R1
2
47R
R3, R8
Show 7 more
QtyPartRefs
14
10K
R4, R5, R6, R13, R18, R24, R25, R26 +6
2
12k4
R7, R15
5
22R
R12, R14, R32, R33, R34
4
100R
R27, R29, R30, R31
1
12K1 1%
R37
4
51R
R38, R39, R41, R42
2
1K
R44, R45

Tanklevel design files

The KiCad project lives in the Th3Link/tanklevel repository on GitHub; these links point at the commit this page was built from.

Tanklevel: common questions

What microcontroller does the Tanklevel use?

The Tanklevel is built around the ESP32-WROOM-32, from the ESP32 family.

How big is the Tanklevel PCB?

The Tanklevel measures 70 × 60 mm, has 4 copper layers and is 4.69 mm thick.

How many components are on the Tanklevel?

68 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the Tanklevel design files?

From the Th3Link/tanklevel repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Tanklevel design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which Th3Link chose for the repository.

Can I test firmware for the Tanklevel without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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