CJMCU-8223 nRF51822 LIS3DH Module - Bluetooth Accelerometer Board

The CJMCU-8223 is a compact multi-protocol module that combines the Nordic nRF51822 Bluetooth Low Energy SoC with the STMicroelectronics LIS3DH three-axis accelerometer, creating a ready-to-use platform for motion sensing and wireless connectivity. The nRF51822 provides a 32-bit ARM Cortex-M0 processor, 256KB flash, 16KB RAM, and a 2.4GHz multiprotocol radio supporting both Bluetooth 4.0 Low Energy and proprietary Gazell stacks, with programmable output power from -20dBm to +4dBm. The onboard LIS3DH accelerometer offers user-selectable full scales of ±2g, ±4g, ±8g, and ±16g, a 16-bit digital output, a built-in temperature sensor, and a 32-level FIFO buffer that reduces host intervention. Communication with the accelerometer is handled over I2C or SPI, and the module operates from a wide 1.71V to 3.6V supply with an ultra-low current consumption of just 2µA in low-power modes. This Bluetooth accelerometer module is suited to wearables, beacons, RFID tags, smart home devices, industrial monitoring equipment, and fitness or healthcare sensors, where the combination of a BLE 4.0 module and a 3-axis accelerometer module simplifies motion-aware wireless product design.

CJMCU-8223 module Application

1. Wearable devices including fitness trackers, smart watches, and activity monitors with wireless motion sensing.
2. Beacons, proximity tags, and security alert devices requiring low-power BLE connectivity.
3. Data acquisition systems, game controllers, computer peripherals, toys, and electronic games.
4. Smart home appliances, RFID labels, and domestic control equipment.
5. Industrial monitoring and control applications that need a compact, low-power 3-axis accelerometer module.

CJMCU-8223 module Specifications

1. SoC: Nordic nRF51822 (32-bit ARM Cortex-M0)
2. Accelerometer: STMicroelectronics LIS3DH (3-axis)
3. Supply voltage: 1.71V to 3.6V
4. Current consumption: 2µA (low-power mode)
5. Acceleration range: ±2g, ±4g, ±8g, ±16g (user-selectable)
6. Output data: 16-bit
7. Interface: I2C / SPI
8. FIFO buffer: 32-level (96-level data output at 16-bit)
9. Temperature sensor: integrated
10. Motion detection: supported
11. RF transceiver: 2.4GHz multiprotocol (BLE 4.0 and Gazell)
12. Output power: -20dBm to +4dBm
13. Flash memory: 256KB
14. RAM: 16KB
15. ADC: 10-bit
16. Encryption: 128-bit AES hardware
17. Operating temperature: -40°C to +85°C