u-blox NINA-B221-03B 蓝牙模块 ESP32，天线引脚，u-connectXpress

Protocol: BLE, Bluetooth 4.2

Data Rate: 1 Mb/s

Frequency: 2.4 GHz

Output Power: 8 dBm

Interface Type: UART

Moisture Sensitive: Yes

Receiver Sensitivity: - 88 dBm

Supply Voltage - Max: 3.6 V

Supply Voltage - Min: 3 V

Operating Supply Voltage: 3 V to 3.6 V

Maximum Operating Temperature: + 85 C

Minimum Operating Temperature: - 40 C

Protocol - Bluetooth, BLE - 802.15.1: Bluetooth, BLE