$ bluetoothctl Agent registered [bluetooth]# scan on Discovery started [NEW] Device 00:90:72:56:98:D7 UM24C [CHG] Device 00:90:72:56:98:D7 RSSI: -60 [bluetooth]# pair 00:90:72:56:98:D7 Attempting to pair with 00:90:72:56:98:D7 [CHG] Device 00:90:72:56:98:D7 Connected: yes Request PIN code [UM241m[agent] Enter PIN code: 1234 [CHG] Device 00:90:72:56:98:D7 UUIDs: 00001101-0000-1000-8000-00805f9b34fb [CHG] Device 00:90:72:56:98:D7 ServicesResolved: yes [CHG] Device 00:90:72:56:98:D7 Paired: yes Pairing successful [bluetooth]# trust 00:90:72:56:98:D7 [CHG] Device 00:90:72:56:98:D7 Trusted: yes Changing 00:90:72:56:98:D7 trust succeeded [bluetooth]# exit $ rfcomm bind 0 00:90:72:56:98:D7 --------- /dev/rfcomm0:115200:8N1 (1000:2.86) ------------------ > F0 < 09 63 - Begin UM24C 01 91 - volts, 401/100 = 4.01 V 00 00 - amps, 0/1000 = 0 A 00 00 00 00 - watts, 0/1000 = 0 W 00 1E - temp_c, 30 °С 00 57 - temp_f, 87 °F 00 00 - data_group_selected, 0 00 00 0B 63 00 00 3A 6A - Group 0: 2.915Ah, 14.954Wh 00 00 00 00 00 00 00 00 - Group 1 00 00 05 C5 00 00 1E 39 - Group 2 00 00 08 4E 00 00 2B 9C - Group 3 00 00 03 64 00 00 11 C5 - Group 4 00 00 07 0C 00 00 24 50 - Group 5 00 00 04 03 00 00 14 A2 - Group 6 00 00 01 40 00 00 06 8D - Group 7 00 00 00 00 00 00 00 00 - Group 8 00 00 00 00 00 00 00 00 - Group 9 00 00 - data_line_positive_volts, 0/100 = 0 V 00 00 - data_line_negative_volts, 0/100 = 0 V 00 00 - charging_mode, 0 00 00 00 00 - record_amphours, 0/1000 = 0Ah 00 00 00 00 - record_watthours, 0/1000 = 0Wh 00 0A - record_threshold, 10/100 = 0.1A 00 00 00 00 - record_seconds, 0 sec 00 00 - recording, 0 00 01 - screen_timeout, 1 min 00 03 - screen_brightness, 3 00 01 86 9F - resistance, 99999/10 = 9999.9 Om 00 00 - screen_selected, 0 FF F1 - End UM24C