# Pycom SiPy > ESP32-based MicroPython development board with WiFi, Bluetooth LE, and +22dBm SigFox radio (RCZ2/RCZ4). Breadboard-compatible with ultra-low power modes, ideal for long-range sub-GHz IoT deployments. ## Quick Facts - **Brand:** Pycom - **Board Type:** dev-board - **Price:** ~$54.95 - **Product Readiness:** developer - **CPU:** Espressif ESP32 dual-core Xtensa LX6 - **CPU Architecture:** Xtensa LX6 - **CPU Cores:** 2 - **RAM:** 520KB SRAM - **Flash:** 4MB - **Power:** 3.3V-5.5V via pin headers or Pycom expansion board - **Operating Voltage:** 3.3V - **Dimensions:** 55.1mm × 20.3mm × 9.6mm - **Weight:** 7g - **Antenna:** U.FL/IPEX ## Connectivity - **Wifi:** 802.11 b/g/n - **Bluetooth:** BLE 4.2 ## Open Source - **Firmware:** Yes - **Schematics:** No - **PCB Layout:** No ## Certifications FCC, CE, RoHS ## Compatible Firmware micropython ## Use Cases - asset-tracking - lpwan - iot-sensor-platform - environmental-monitoring - smart-metering ## Components - **ESP32** (mcu): Dual-core Xtensa LX6 SoC at 240 MHz with integrated 802.11 b/g/n WiFi and Bluetooth 4.2/BLE. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=pycom-sipy&source=md-export) - **AX-SFEU SigFox Module** (wireless-module): SigFox-certified radio module with +22dBm output power supporting RCZ2/RCZ4 frequency regions. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3534%2FSiPy_specs.pdf&ref=openhardware.directory&product=pycom-sipy&source=md-export) ## Protocols - **I2C**: SDA: P9, SCL: P10 - **SPI**: MOSI: P10, MISO: P11, SCK: P12 - **UART**: TX: P1, RX: P0 - **WiFi**: - **Bluetooth**: ## GPIO Map | Pin | Name | Type | Functions | |-----|------|------|-----------| | P0 | RX | UART | digital-input, digital-output | | P1 | TX | UART | digital-input, digital-output | | P2 | GPIO | — | digital-input, digital-output | | P3 | GPIO | — | digital-input, digital-output | | P4 | GPIO | — | digital-input, digital-output | | P6 | GPIO | — | digital-input, digital-output | | P7 | GPIO | — | digital-input, digital-output | | P8 | GPIO | — | digital-input, digital-output | | P9 | SDA | I2C | digital-input, digital-output | | P10 | SCL/MOSI | I2C | digital-input, digital-output | | P11 | MISO | SPI | digital-input, digital-output | | P12 | SCK | SPI | digital-input, digital-output | | P13 | GPIO | — | digital-input, digital-output | | P14 | GPIO | — | digital-input, digital-output | | P15 | GPIO/ADC | — | digital-input, digital-output, analog-input | | P16 | GPIO/ADC | — | digital-input, digital-output, analog-input | | P17 | GPIO/ADC | — | digital-input, digital-output, analog-input | | P18 | GPIO/ADC | — | digital-input, digital-output, analog-input | | P19 | GPIO/ADC | — | digital-input, digital-output, analog-input | | P20 | GPIO/ADC | — | digital-input, digital-output, analog-input | | P21 | GPIO | — | digital-input, digital-output | | P22 | GPIO | — | digital-input, digital-output | ## Available Software - **[MicroPython]()** (open-source) ## Description ## Overview The Pycom SiPy is a triple-network IoT development board combining Espressif ESP32 computing with SigFox, WiFi, and Bluetooth Low Energy connectivity in one compact module. Measuring 55.1mm × 20.3mm, it fits a standard breadboard and can communicate over three complementary network types from a single device. SigFox is the standout connectivity option: the onboard +22dBm transmitter can reach ranges up to 50km in open terrain and 3-10km in urban environments, using SigFox's global low-power wide-area network. This makes the SiPy suitable for applications requiring wide-area coverage with minimal data payloads — asset tracking, environmental monitoring, utility metering, and industrial telemetry. The device supports RCZ2 and RCZ4 frequency zones and includes an FSK mode for peer-to-peer communication. WiFi at 1km range and Bluetooth LE provide short to medium range connectivity options that complement the long-range SigFox capability. All three radio systems are programmable via MicroPython using Pycom's extended firmware, and the Pymakr IDE provides a productive development environment with REPL access. The dual-core ESP32 SoC delivers substantial computing power with hardware floating-point, hardware encryption, and a ULP co-processor for wake-from-sleep sensor polling. The SiPy was one of the first modules to combine SigFox with ESP32, making it a versatile platform for prototyping LPWAN IoT applications before transitioning to production hardware. ## Where to Buy - [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3534&ref=openhardware.directory&product=pycom-sipy&source=md-export) — 54.95 ## Resources - [product page](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3534&ref=openhardware.directory&product=pycom-sipy&source=md-export) - [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F3534&ref=openhardware.directory&product=pycom-sipy&source=md-export) - [documentation](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.pycom.io%2Fdatasheets%2Fdevelopment%2Fsipy%2F&ref=openhardware.directory&product=pycom-sipy&source=md-export) - [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3534%2FSiPy_specs.pdf&ref=openhardware.directory&product=pycom-sipy&source=md-export) - [pinout](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F3534%2FSiPy_S01_OEM_module_pinout.pdf&ref=openhardware.directory&product=pycom-sipy&source=md-export) - [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fpycom%2Fpycom-micropython-sigfox&ref=openhardware.directory&product=pycom-sipy&source=md-export) ## Tags `sigfox`, `esp32`, `micropython`, `wifi`, `ble`, `iot`, `pycom`, `sub-ghz`, `lpwan` ## Images ![Pycom SiPy](https://nbg1.your-objectstorage.com/openhardware-directory/entities/pycom-sipy/74201df79ead.jpg) ![Pycom SiPy](https://nbg1.your-objectstorage.com/openhardware-directory/entities/pycom-sipy/36defe73f14f.jpg) ![Pycom SiPy](https://nbg1.your-objectstorage.com/openhardware-directory/entities/pycom-sipy/ebb965388d34.jpg) --- [View full device page](https://openhardware.directory/devices/pycom-sipy)