OBDESP
About the OBDESP PCB
OBDESP is an open source ESP32 PCB design by crlab3, published on GitHub. It is a 2-layer board measuring 56.9 × 26 mm, with 34 components from 21 distinct parts.
Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the NCP1117-3.3_DPAK and NRF24L01_SMD. By type, the board carries 12 resistors, 6 diodes, 6 capacitors, 4 connectors, 3 ICs and 1 transistor.
From the project
Latest version of IONRF & ESP32 OBD platform.
Main components on the OBDESP
OBDESP bill of materials (BOM)
34 components, 21 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | NCP1117-3.3_DPAK | SOT-223-3_TabPin2 | U1 |
| 1 | ESP32-WROOM-32 | ESP32-WROOM-32U | U2 |
| 1 | NRF24L01_SMD | NRF24L01_SMD | U3 |
| 1 | BC848CLT1G | SOT-23 | Q1 |
| 1 | USB_A | USB_A_CNCTech_1001-011-01101_Horizontal | J1 |
| 1 | RST | B3U-1000P_Button | J2 |
| 1 | BOOT | B3U-1000P_Button | J3 |
| 1 | UART | PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | Buzzer | PUIAudio_SMT_0825_S_4_R | BZ1 |
| 1 | GREEN_LED | LED_0603_1608Metric | D1 |
| 1 | D | D_SMA | D2 |
| 1 | YELLOW_LED | LED_0603_1608Metric | D3 |
| 1 | WHITE_LED | LED_0603_1608Metric | D4 |
| 2 | LED_RGB | LED_RGB_5050-6 | D5, D6 |
| 1 | FerriteBead_Small | L_0603_1608Metric | FB1 |
| 3 | 10uF | C_0805_2012Metric | C1, C2, C3 |
| 1 | 100nF | C_0603_1608Metric | C4 |
| 2 | 22uF | CP_EIA-3216-18_Kemet-A | C5, C6 |
| 2 | 10k | R_0603_1608Metric | R1, R2 |
| 3 | 220 | R_0603_1608Metric | R3, R4, R5 |
Show 1 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 7 | 100 | R_0603_1608Metric | R6, R7, R8, R9, R10, R11, R12 |
OBDESP design files
The KiCad project lives in the crlab3/OBD_IONRF_ESP32 repository on GitHub; these links point at the commit this page was built from.
- LayoutOBDESP/OBDESP.kicad_pcb
- SchematicOBDESP/OBDESP.kicad_sch
OBDESP: common questions
What microcontroller does the OBDESP use?
The OBDESP is built around the ESP32-WROOM-32, from the ESP32 family.
How big is the OBDESP PCB?
The OBDESP measures 56.9 × 26 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the OBDESP?
34 components, from 21 distinct parts. The full bill of materials is listed on this page.
Where can I download the OBDESP design files?
From the crlab3/OBD_IONRF_ESP32 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the OBDESP design in my own project?
The repository has no license, so all rights stay with crlab3. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the OBDESP 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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