1. Overview - WefaaRobotics/Smorphi GitHub Wiki
The masterboard provided is based off the ESP32-Wroom-32 chip in its core with added extensions.
There are 3 mutually exclusive ways to provide power to the board:
- USB-C port, default power supply
- 5V / GND header pins
- 3V3 / GND header pins
Note: The power supply must be provided using only one of the options above, otherwise the board and/or the power supply source can be damaged.
Each of the 19 digital pins on the ESP32 can be used as an input or output, using the analogRead() function.
The ESP32 has a number of facilities for communicating with a computer, another ESP32, or other microcontrollers. The ESP32 provides wireless capabilites, namely Wi-Fi and Bluetooth. Wired capabilities include 3 SPI channels, 2 I2C channels, 2 I2S channels, 3 UART channels, Ethernet MAC interface, CAN 2.0 and IR(TX/RX). The Arduino software includes a serial monitor which allows a simple textual data to be sent to and from the board. The RX and TX LEDs on the board will flash when data is being transmitted via the ESP32-Wroom-32 chip and USB connection to the computer.
The ESP32 can be programmed in different programming environments. You can use
• Arduino IDE
• Espressif IDF (IoT Development Framework)
• Micropython
• JavaScript
• LUA
| Microcontroller | ESP32 |
|---|---|
| Typical Operating Voltage | 3.3V |
| Input Voltage (Recommended) | 3.0V to 3.6V |
| Input Voltage (Absolute Maximum ratings) | -0.3V to 3.6V |
| Breakout Pins | 19 (of which 16 provide PWM output) |
| DC Current per I/O Pin | 40mA |
| DC Current for 3.3V Pin | 50mA |
| External Flash Memory | 4MB |
| SRAM | 520KB |
| EEPROM | Not Available |
| Clock Speed | Up to 240MHz |
| Communication Interfaces | 2 x I2C interfaces 2I2S interfaces 4 x SPI interfaces 2 x UART interfaces |
| Wi-Fi | 802.11 b/g/n |
| Bluetooth | v4.2 BR/EDR and BLE specification |
| Security | 1024 bit OTP AES, SHA, RSA, ECC, RNG Secure Boot, Flash Encryption |
| Extended temperature range | -40 to 85 °C |