Temp sensor
About the Temp sensor PCB
Temp sensor is an open source ESP32 PCB design by matthewlai, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 20.3 × 40 mm, with 20 components from 16 distinct parts.
Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the AZ1117-3.3, CP2104 and CH340C. By type, the board carries 6 capacitors, 6 resistors, 4 ICs, 2 transistors, 1 connector and 1 diode.
It belongs with the sensors and usb & debug tools designs in this gallery.
From the project
Home automation
Main components on the Temp sensor
Temp sensor bill of materials (BOM)
20 components, 16 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AZ1117-3.3 AP2112K-3.3 | SOT-23-5 | U1 |
| 1 | CP2104 SHT31-DIS | Sensirion_DFN-8-1EP_2.5x2.5mm_P0.5mm_EP1.1x1.7mm | U2 |
| 1 | ESP32-WROOM-32 | ESP32-WROOM-32 | U3 |
| 1 | CH340C | SOIC-16_3.9x9.9mm_P1.27mm | U4 |
| 2 | C2150 Q_NPN_BEC | SOT-23 | Q1, Q2 |
| 1 | USB_A | USB-A-XKB_U217 | J1 |
| 1 | C72043 Green | LED_0603_1608Metric | D11 |
| 1 | 1UF 10uF | R_0402_1005Metric | C1 |
| 1 | 0.1UF 0.1uF | R_0402_1005Metric | C2 |
| 1 | 4.7UF 0.1uF | R_0402_1005Metric | C3 |
| 1 | 1UF 1uF | R_0603_1608Metric | C4 |
| 1 | 22UF 1uF | R_0603_1608Metric | C5 |
| 1 | 0.1UF 4.7uF | R_0402_1005Metric | C6 |
| 3 | 10KR 10kR | R_0402_1005Metric | R1, R2, R3 |
| 2 | 100R 10kR | R_0402_1005Metric | R4, R5 |
| 1 | 47R | R_0402_1005Metric | R12 |
Temp sensor design files
The KiCad project lives in the matthewlai/WiredHut repository on GitHub; these links point at the commit this page was built from.
Temp sensor: common questions
What microcontroller does the Temp sensor use?
The Temp sensor is built around the ESP32-WROOM-32, from the ESP32 family.
How big is the Temp sensor PCB?
The Temp sensor measures 20.3 × 40 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Temp sensor?
20 components, from 16 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Temp sensor design files?
From the matthewlai/WiredHut repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Temp sensor design in my own project?
Yes, under the terms of its GPL-3.0 license, which matthewlai chose for the repository.
Can I test firmware for the Temp sensor 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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