Pycom SiPy (Europe/Japan/Korea) - Sigfox+WiFi+Bluetooth MicroPython IoT Platform

The SiPy is a multi-network (Sigfox, WiFi and BLE) development platform. It is programmable with MicroPython and the Pymakr IDE for fast IoT application development, easy programming in-field and extra resilience with network failover.

The best blend of speed to deployment and access to new LPWAN networks rolling out across Europe, USA, Africa and India. You can also configure the SiPy in FSK mode to send packets directly from SiPy to SiPy. This way you can create the network configuration of your choice and then use another SiPy as a central Nano-Gateway to forward the data to the cloud via WiFi. The module is CE, FCC, IC and RCM certified!

Using the Sigfox radio without the external antenna can lead to damage of the device and is therefore not recommended.

Note: Pycom modules are powered by the new and feature-packed Espressif ESP32 chip. As a result, their firmware is evolving constantly as the ESP32 IDF matures. Regular firmware updates are therefore provided.

SiPy Features

  • Powerful CPU, BLE and state of the art WiFi radio
  • 1km WiFi range
  • MicroPython-enabled
  • Fits in a standard breadboard (with headers)
  • Ultra-low power usage: a fraction compared to other connected microcontrollers


  • Espressif ESP32 chipset
  • Dual processor and WiFi radio system on chip
  • Network processor handles the WiFi connectivity and the IPv6 stack
  • Main processor is entirely free to run the user application
  • An extra ULP-coprocessor that can monitor GPIOs, the ADC channels and control most of the internal peripherals during deep-sleep mode while only consuming 25uA

Sigfox operating frequencies

  • RCZ1: 868MHz (Europe)
  • RCZ3: (Japan and Korea)


  • 2x UART, 2x SPI, I2C, I2S, micro-SD card
  • Analog channels: 8×12 bit ADCs
  • Timers: 4×16 bit with PWM and input capture
  • DMA on all peripherals
  • GPIO: up to 24




802.11b/g/n 16mbps


Low-energy and classic


Running at 32KHz


Node range: up to 50km

Security & certifications

  • SSL/TLS support
  • WPA Enterprise security
  • AES encryption engine


  • RAM: 512kb
  • Flash Memory: 4MB
  • Hardware floating point acceleration
  • Python multi-threading

Sigfox specification

  • TI CC1125 narrow-band transceiver
  • Class 0 device. maximum Tx power:
    • +14dBm (Europe)
  • Node range: up to 50km
  • Sigfox-certified


  • Voltage input: 3.3V – 5.5V
  • 3V3 output capable of sourcing up to 400mA
  • WiFi: 12mA in active mode, 5uA in standby
  • Sigfox (Europe): 17mA in Rx mode, 47mA in Tx mode and 0.5uA in standby
  • Sigfox (Australia, New Zealand and South America): 24mA in Rx mode, 257mA in Tx mode and 0.5uA in standby

Size & weight

  • 55mm x 20mm x 3.5mm (without headers)
  • 7g (31g packaged)