DIYBMS ESP32 Controller
About the DIYBMS ESP32 Controller PCB
DIYBMS ESP32 Controller is an open source ESP32 PCB design by stuartpittaway, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 122.5 × 87.6 mm, with 90 components from 45 distinct parts.
Its main chip is the ESP32-DEVKITC-32D, from the ESP32 family. Other key parts include the TXS0102DCU, C32565, TCA6416APWR, SN65HVD75DR and AMS1117-3.3. By type, the board carries 32 resistors, 16 connectors, 14 capacitors, 10 ICs, 6 diodes and 4 transistors.
It belongs with the power & battery designs in this gallery.
From the project
Version 4 of the diyBMS
This is the latest version of the diyBMS controller
THIS REPOSITORY CONTAINS THE HARDWARE FOR THE SYSTEM
The latest version of the controller uses an ESP32 and supports CANBUS, RS485, SD CARD logging, relays, SSR outputs, multiple inputs, AVR programmer and much more.
Although the hardware is complete, not all features are usable from the software, this will be developed and improved over time to make use of the hardware.
Main components on the DIYBMS ESP32 Controller
DIYBMS ESP32 Controller bill of materials (BOM)
90 components, 45 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TXS0102DCU | VSSOP-8_2.3x2mm_P0.5mm | U1 |
| 1 | C32565 EL3H7(B)(TA)-G | SOP-4_4.4x2.6mm_P1.27mm | U2 |
| 1 | TCA6416APWR | TSSOP-24_4.4x7.8mm_P0.65mm | U3 |
| 1 | ESP32-DEVKITC-32D | MODULE_ESP32-DEVKITC-32D | U4 |
| 1 | SN65HVD75DR | SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U6 |
| 1 | SN65HVD1050D | SOIC-8_3.9x4.9mm_P1.27mm | U7 |
| 1 | INA229AIDGSR INA229 | VSSOP-10_3x3mm_P0.5mm | U8 |
| 2 | LT219-1 | SO-4_4.4x3.6mm_P2.54mm | U9, U12 |
| 3 | AO3400A | SOT-23 | Q1, Q2, Q4 |
| 1 | AO3401A | SOT-23 | Q3 |
| 6 | 4PINBLOCK 4PinBlock | WJ15EDGRC-3.81-4P | J1, J4, J7, J9, J12, J17 |
| 2 | SCREWTERMINAL3PIN ScrewTerminal3Pin | Terminal-Block_5.0mm_3P-LCSC_C395850 | J2, J3 |
| 1 | WJ15EDGRC-3.81-2P ScrewTerminal | WJ15EDGRC-3.81-2P | J5 |
| 2 | KH-2.54FH-1X19P-H8.5 19PinSocket | placeholder | J6, J11 |
| 1 | C132438 2x3 2.54mm IDC Connectors | PinHeader_2x03_P2.54mm_Vertical | J8 |
| 1 | S2B-PH-K-S-GW ESTOP | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J10 |
| 1 | KH-2.54FH-1X14P-H8.5 14PinSocket | placeholder | J13 |
| 1 | 0472192001 Molex 0472192001 | 0472192001 | J15 |
| 1 | KH-2.54FH-1X4P-H8.5 4PinSocket | placeholder | J16 |
Show 25 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TLC-LSMD300D/16 Fuse, 3A | Fuse_2920_7451Metric | F1 |
| 1 | OptTermination | SolderJumper-2_P1.3mm_Bridged_Pad1.0x1.5mm | JP1 |
| 1 | OptTermination | SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP4 |
| 2 | SRD-05VDC-SL-C | RELAY_SRD-05VDC-SL-C | K1, K2 |
| 1 | LCD | TFTSPI_2_8_240x320_TOUCH | LCD1 |
| 2 | XUNPU TS-1002-10026 SW_Push | SW_PUSH_6mm_H5mm | SW1, SW2 |
| 1 | C219409 RGB | LED_RGB_5050-6 | D1 |
| 2 | LL4148 | D_MiniMELF | D2, D5 |
| 2 | C72038 YELLOW LED | LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D3, D4 |
| 1 | NUP2105LT1G | SOT-23 | D8 |
| 6 | CC0603KRX7R9BB104 100nF | C_0603_1608Metric | C1, C2, C6, C8, C9, C14 |
| 2 | TC212A226K006Y 22uF 6.3V | CP_EIA-3216-18_Kemet-A_Pad1.58x1.35mm_HandSolder | C3, C4 |
| 1 | CL31A226KPHNNNE 22uF | C_1206_3216Metric | C5 |
| 4 | CL10A105KB8NNNC 1uF | C_0603_1608Metric | C7, C10, C11, C13 |
| 1 | C0805C104K1RECAUTO 0.1uF-100V | C_0805_2012Metric | C12 |
| 5 | 0603WAF2200T5E 220R | R_0603_1608Metric | R1, R17, R18, R21, R25 |
| 3 | 0603WAF2201T5E 2K2 | R_0603_1608Metric | R2, R5, R16 |
| 1 | 0805W8F1800T5E 180R | R_0805_2012Metric | R3 |
| 5 | 0603WAF5600T5E 560R | R_0603_1608Metric | R4, R10, R12, R13, R14 |
| 3 | 0603WAF1200T5E 120R | R_0603_1608Metric | R6, R8, R9 |
| 4 | 0603WAF5102T5E 51K | R_0603_1608Metric | R7, R11, R15, R27 |
| 5 | 0603WAF1002T5E 10K | R_0603_1608Metric | R19, R22, R29, R31, R32 |
| 1 | 0603WAF1004T5E 1M | R_0603_1608Metric | R20 |
| 2 | 0805W8F100JT5E 10R | R_0805_2012Metric | R23, R30 |
| 3 | 0603WAF2202T5E 22K | R_0603_1608Metric | R24, R26, R28 |
DIYBMS ESP32 Controller design files
The KiCad project lives in the stuartpittaway/diyBMSv4 repository on GitHub; these links point at the commit this page was built from.
DIYBMS ESP32 Controller: common questions
What microcontroller does the DIYBMS ESP32 Controller use?
The DIYBMS ESP32 Controller is built around the ESP32-DEVKITC-32D, from the ESP32 family.
How big is the DIYBMS ESP32 Controller PCB?
The DIYBMS ESP32 Controller measures 122.5 × 87.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the DIYBMS ESP32 Controller?
90 components, from 45 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 DIYBMS ESP32 Controller design files?
From the stuartpittaway/diyBMSv4 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the DIYBMS ESP32 Controller design in my own project?
It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.
Can I test firmware for the DIYBMS ESP32 Controller 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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