u-blox NINA-B221-04B 蓝牙模块 ESP32，天线引脚，u-connectXpress

Protocol: BLE, Bluetooth 5.0, BR/EDR

Data Rate: 1 Mb/s, 2 Mb/s, 3 Mb/s

Frequency: 2.4 GHz to 2.4835 GHz

Dimensions: 10.6 mm x 10 mm x 2.2 mm

Output Power: 5 dBm

Interface Type: GPIO, SPI, UART

Protocol - Sub GHz: ISM

Receiver Sensitivity: - 88 dBm

Supply Voltage - Max: 3.45 V

Supply Voltage - Min: 3 V

Antenna Connector Type: Pin

Supply Current Receiving: 60 mA, 110 mA

Supply Current Transmitting: 80 mA, 150 mA

Maximum Operating Temperature: + 85 C

Minimum Operating Temperature: - 40 C

Protocol - Bluetooth, BLE - 802.15.1: Bluetooth, BLE