Reader
About the Reader PCB
Reader is an open source ESP32 PCB design by bullestock, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 58 × 32 mm, with 34 components from 20 distinct parts.
Its main chip is the ESP32-WROOM-32U, from the ESP32 family. Other key parts include the RDM6300, MAX485E and AMS1117-3.3. By type, the board carries 13 resistors, 6 capacitors, 4 ICs, 4 diodes, 2 transistors and 2 connectors.
From the project
Rewrite of Access Control System in Django
Main components on the Reader
Reader bill of materials (BOM)
34 components, 20 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-WROOM-32U | ESP32-WROOM-32U | U1 |
| 1 | RDM6300 | RDM6300_B38.5x18.2mm | U2 |
| 1 | MAX485E | SOIC-8_3.9x4.9mm_Pitch1.27mm | U3 |
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U5 |
| 2 | MMBT3904 | SOT-23 | Q1, Q2 |
| 1 | Debug | PinHeader_1x06_P2.54mm_Vertical | J1 |
| 1 | RS485 | JST_XH_S04B-XH-A_1x04_P2.50mm_Horizontal | J2 |
| 1 | Buzzer | Buzzer_D22mm_H8mm_P10mm | BZ1 |
| 2 | SW_SPST | SW_SPST_CK_RS282G05A3 | SW1, SW2 |
| 2 | LED | LED_D5.0mm | D1, D2 |
| 2 | 3V9 | D_MiniMELF | D3, D4 |
| 2 | 10u | C_0805_2012Metric | C1, C3 |
| 4 | 100n | C_0603_1608Metric | C2, C4, C5, C7 |
| 2 | 270 | R_0603_1608Metric | R1, R2 |
| 3 | 1k2 | R_0603_1608Metric | R3, R5, R9 |
| 3 | 2k2 | R_0603_1608Metric | R4, R6, R10 |
| 1 | 100 | R_0603_1608Metric | R7 |
| 1 | 120 | R_0603_1608Metric | R8 |
| 1 | 4k7 | R_0603_1608Metric | R11 |
| 2 | 10k | R_0603_1608Metric | R12, R13 |
Reader design files
The KiCad project lives in the bullestock/acsv2 repository on GitHub; these links point at the commit this page was built from.
Reader: common questions
What microcontroller does the Reader use?
The Reader is built around the ESP32-WROOM-32U, from the ESP32 family.
How big is the Reader PCB?
The Reader measures 58 × 32 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Reader?
34 components, from 20 distinct parts. The full bill of materials is listed on this page.
Where can I download the Reader design files?
From the bullestock/acsv2 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Reader design in my own project?
Yes, under the terms of its GPL-3.0 license, which bullestock chose for the repository.
Can I test firmware for the Reader 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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