Most WiFi IoT modules are designed to be integrated into products with an enclosure, but the M5Stamp Pico module based on ESP32-PICO-D4 SiP comes with a removable heat-resistant plastic shell that protects the 3D antenna and components, while leaving space to solder headers and/or a Grove connector.
The tiny module also comes with a button and RGB LED, and like other ESP32-based M5Stack hardware, M5Stamp Pico is programmable with UIFlow graphical programming platform and compatible with Arduino, MicroPython, and the ESP-IDF.
- System-in-Package – Espressif Systems ESP32-PICO-D4 SiP with dual-core processor @ 240MHz, 520KB SRAM, 4MB flash, and 2.4 GHz Wi-Fi 4 up to 150 Mbps and Bluetooth 4.2 BR/LE connectivity
- Antenna – 2.4 GHz 3D antenna
- I/Os – 2.54mm pitch header with ADC, DAC, touch sensor, SD/SDIO/MMC host controller, SPI, SDIO/SPI slave controller, EMAC, PWM, UART, I2C, I2S, IR remote controller, up to 12x GPIO, pulse counter
- Misc – User button, RGB LED (SK6812)
- Input Voltage – 5V @ 500mA
- Power consumption
- Standby – 5V @ 29mA
- WiFi station mode – 5V @ 60mA
- Bluetooth mode data sending status – 5V @ 84mA
- Deep-sleep mode: 5V @ 0.35mA
- Temperature Range – 0°C to 40°C
- Dimensions – 24 x 18 x 4.4mm; M.2 screw for heat-resistant (up to 250°C) plastic shell
- Weight – 1.6 grams
The M5Stamp Pico is sold with a sticker with clear marking to help with connections, and also offers in kits with male and female headers, a Grove connector, a hex key, and an optional USB-C to TTL board to flash the board. The module can also be soldered like an SMT component to a baseboard, and you can keep the shell on during reflow soldering.
You’ll find details in the documentation which also explains how to get started with UIFlow visual programming or Arduino. Typical applications listed by M5stack including Wi-Fi remote monitoring, Smart Home devices, fire/security intelligent integrated management, Smart Card terminals, and Wireless PoS.
The M5Stamp Pico is packed in reels during manufacturing, and the company sells cutouts with 5 pieces for $23.90 (or about $4.8 per module). There are also two kits that are currently out of stock with the $5 Pico Mate with pin header, and the $15.95 DIY kit that only adds the “ESP32 Downloader” USB to TTL board.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.