2 layers24.1 × 36.2 mm
Esp32miniBT
asterics/esp32_mouse_keyboard
ESP32 implementation for HID over GATT Keyboard and Mouse (Bluetooth Low Energy). Including serial API for external modules (similar to Adafruit EZKey HID)
28 parts911GPL-3.0
2 layers
PerfboardPrototype
jostsalathe/focan-uart8Reverse engineering effort for the UART protocol used between Focan E-Scooter/-Bike displays (GZ3 is the actual test subject) and motor controllers..
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 24
- Nets
- 46
- Pads
- 104
- Tracks, vias
- 21, 0
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 29 Jun 2022
- Updated
- 3 Nov 2023
Overview
PerfboardPrototype is an open-source printed circuit board by jostsalathe, from the jostsalathe/focan-uart repository on GitHub. It is a 2-layer board with 24 parts on 46 nets, routed with 21 tracks and 0 vias.
It is built around the ESP32-WROOM-32 and DM01. Its parts include 12 resistors, 5 diodes, 2 ICs and 1 capacitor. It belongs with the robots and motor control boards and the ESP32 boards of this library.
Main components
2
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi ModulesDM01
SMD,P=2.54mm-20℃~+85℃ 1 2,000 cycles 2.54mm 24V 25mA Gull Wing SPST Slide, Rocked SMD,P=2.54mm DIP Switches ROHSAPEMDIP Switches
README
dataLogger/perfboardPrototype/README.mdPerfboard Prototype
Used Parts
- ESP32-WROOM-32D module (U2)
- SPI MicroSD card module (J_SD1)
- DM01 V2.0 fixed voltabe buck converter module (52 V max input, 3.3 V out) (U1)
- 70 mm * 30 mm perforated prototyping board
- 470k 1% axial 1/4 W resistor (R2), 12k 1% 0603 1/10W SMD resistor (R3) and 100nF 0603 SMD capacitor (C1) for measuring battery voltage
- 10k 1% axial 1/4 W resistor (R4) and some 3V zener diode (D1) for wakeup pin
- 10k 1% axial 1/4 W resistor for EN pin pullup (R1)
- JST-SM 5 pin connectors, one of each gender (J_DU1 and J_MCU1)
- 5 pin socket for flashing firmware and debugging (J_PRG1)
Pinout
| connector | pin# | signal name | ESP32 pin | description |
|---|---|---|---|---|
| J_PRG1 | 1 | GND | GND | ground connection of programmer |
| J_PRG1 | 2 | TX_DBG | IO1 | UART TX to programmer |
| J_PRG1 | 3 | RX_DBG | IO3 | UART RX from programmer |
| J_PRG1 | 4 | BOOT | IO0 | boot mode with internal pullup |
| J_PRG1 | 5 | EN | EN | enable with external pullup (R1) |
| J_DU1/J_MCU1 | 1 | +BATT | IO39 | battery voltage that supplies this unit |
| J_DU1/J_MCU1 | 2 | PWR_MCU | IO34 | The DU feeds battery power to the MCU via this connection when it is on. Use this signal to wake from deep sleep. |
| J_DU1/J_MCU1 | 3 | GND | GND | ground connection for external hardware |
| J_DU1 | 4 | TX1 | IO17 | UART TX to DU |
| J_DU1 | 5 | RX1 | IO16 | UART RX from DU |
| J_MCU1 | 4 | RX2 | IO19 | UART RX from MCU |
| J_MCU1 | 5 | TX2 | IO18 | UART TX to MCU |
| J_SD1 | 1 | 3V3 | VDD | supply voltage for MicroSD card |
| J_SD1 | 2 | CS | IO32 | chip select for MicroSD card |
| J_SD1 | 3 | MOSI | IO33 | serial data to MicroSD card |
| J_SD1 | 4 | CLK | IO26 | serial clock for MicroSD card |
| J_SD1 | 5 | MISO | IO14 | serial data from MicroSD card |
| J_SD1 | 6 | GND | GND | ground conneciton for MicroSD card |
Notes on Measuring +BATT
Due to the chosen voltage devider you should call analogSetAttenuation(ADC_2_5db);.
With this attenuation setting you should use double vBat = (analogRead(39) + 272.5) / 77.95; to calculate the actual battery voltage.
Parts
24| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R3, R4, R5, R6, R7, R8, R9, R10 |
| 5 | D_Z3V | Diode_THT:D_A-405_P2.54mm_Vertical_AnodeUp | D1, D2, D3, D4, D5 |
| 2 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R1, R12 |
| 2 | Conn_01x05 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J_DU1, J_MCU1 |
| 1 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 390k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R11 |
| 1 | 39k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R2 |
| 1 | Conn_01x05 | Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Horizontal | J_PRG1 |
| 1 | DM01 | MyParts:DM01 | U1 |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U2 |
| 1 | Micro_SD_Card_SPI | MyParts:microSD_SPI_module | J_SD1 |
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Questions
What parts does the PerfboardPrototype use?
24 parts, built around the ESP32-WROOM-32 and DM01. 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.
Where can I download the PerfboardPrototype KiCad files?
From the jostsalathe/focan-uart repository on GitHub, at the commit this page was made from: the board is dataLogger/perfboardPrototype/perfboardPrototype.kicad_pcb and its schematic dataLogger/perfboardPrototype/perfboardPrototype.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PerfboardPrototype design in my own project?
Its repository states no licence, so its author keeps all rights: ask jostsalathe before reusing the design.