12Robert20/Temp_ReaderThis directory contains the hardware design files for the Temp Reader (Transmitter Node) project, developed using KiCad.
Temp Reader is an open-source printed circuit board by 12Robert20, from the 12Robert20/Temp_Reader repository on GitHub. It is a 2-layer board of 30 × 40 mm with 22 parts on 35 nets, routed with 151 tracks and 21 vias.
It is built around the BME280 and CH340N. Its parts include 9 capacitors, 5 ICs, 4 resistors, 2 connectors and 2 switches. It belongs with the STM32 boards of this library.
This directory contains the hardware design files for the Temp Reader (Transmitter Node) project, developed using KiCad.
Temp Reader.kicad_pro – KiCad project fileTemp Reader.kicad_sch – Schematic (single-sheet flattened design)Temp Reader.kicad_pcb – PCB layoutThis specific board functions as the Transmitter Node for environmental telemetry. The hardware architecture has been transitioned to an STM32-based core. The custom PCB is a fully routed 2-layer design featuring dedicated copper pours for GND, +3.3V, and VBUS to ensure robust power distribution and signal integrity.
Component Stack:
The firmware is not included in this directory and will be available in the /Firmware folder once development begins. The STM32 transmitter firmware will utilize the STM32 hardware abstraction layer (HAL/LL) or a custom bare-metal approach.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100nF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3 |
| 2 | 10k | Resistor_SMD:R_0402_1005Metric | R4, R10 |
| 2 | 22u | Capacitor_SMD:C_0805_2012Metric | C7, C8 |
| 2 | 5K1 | Resistor_SMD:R_0402_1005Metric | R11, R12 |
| 2 | SW_SPDT | Button_Switch_THT:SW_CK_JS202011CQN_DPDT_Straight | SW1, SW2 |
| 1 | 0.1u | Capacitor_SMD:C_0402_1005Metric | C9 |
| 1 | 100n | Capacitor_SMD:C_0402_1005Metric | C5 |
| 1 | 10u | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | BME280 | Package_LGA:Bosch_LGA-8_2.5x2.5mm_P0.65mm_ClockwisePinNumbering | U2 |
| 1 | CH340N | Package_SO:JEITA_SOIC-8_3.9x4.9mm_P1.27mm | U7 |
| 1 | Conn_01x04_Pin | Connector_PinHeader_1.27mm:PinHeader_1x04_P1.27mm_Vertical_SMD_Pin1Left | J1 |
| 1 | LT1963AxST-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U5 |
| 1 | NRF24L01_Breakout | RF_Module:nRF24L01_Breakout | U4 |
| 1 | STM32G030F6Px | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U1 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J2 |
It measures 30 × 40 mm and has 2 copper layers, 1.6 mm thick.
22 parts, built around the BME280 and CH340N. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the 12Robert20/Temp_Reader repository on GitHub, at the commit this page was made from: the board is Hardware/Temp Reader.kicad_pcb and its schematic Hardware/Temp Reader.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask 12Robert20 before reusing the design.
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