The EE-02 module is built around the nRF52 SoC paired with a Semtech SX1276 LoRa chip. A complete overview over both can be found in the nRF52 Product Specification and in the SX1276 Data Sheet.

The schematics for the module is available here and you can see the pinout here


  • CPU: 32-bit ARM Cortex M4 with FPU
  • Memory: 64 KB
  • Storage: 512 KB Flash

Wireless features

  • Bluetooth Low Energy, -96 dBm sensitivity
  • 2Mbps in BLE mode
  • NFC-A type 2
  • LoRa, -148 dBm sensitivity


  • Onboard temperature sensor
  • 12-bit 200 ksps ADC with 8 channels, programmable gain
  • AES-256 encryption in hardware
  • 16 available GPIO pins
  • 4 PWM pins
  • 3 Real-Time Counters

Operating range

  • -40˙ - 85˙ C
  • 1.8V - 3.7V operating range


  • NFC-A ready
  • Integrated bluetooth antenna
  • Integrated LoRA chip antenna (EU-868 ISM band)
  • u.FL connector for 433 MHz ISM band
  • Pins for NFC antenna on edge connector

Power consumption

Power consumption
MCU Sleep mode w/ RAM retention 0.7µA
MCU Sleep w/ wake on RTC 1.9 µA
BLE TX 5.3mA peak
BLE RX 5.4mA peak
 MCU running from flash  58 µA / MHz
MCU running from RAM 51 µA / MHz
LoRa TX 120mA (+20 dBm), 87mA (+17dBm)
LoRa RX 12.0 mA typical
SX1276 sleep 0.2 µA typical, 1µA peak
SX1276 standby mode 1.6mA typical

Physical dimensions

The EE-02 module is 27mm x 26mm x 5mm including the chip antenna.