Skip to content

scaprile/bt-common

 
 

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

94 Commits
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

Low level Bluetooth support

Currently contains only GATT server implmenetation for ESP32.

Configuration section

bt-common library adds a bt configuration section with the following settings:

"bt": {
  "enable": true,             // Enabled by default. Disabled on first reboot with WiFi on
  "dev_name": "",             // Device name. If empty, value equals to device.id
  "adv_enable": true,         // Advertise our Bluetooth services
  "keep_enabled": true,       // Keep enabled after successful boot with WiFi on
  "scan_rsp_data_hex": "",    // Custom scan response data, as hex string (e.g. `48656c6c6f` for `Hello`)
  "allow_pairing": true,      // Allow pairingbonding with other devices
  "max_paired_devices": 10,   // Allow pairing with up to this many devices; -1 - no limit
  "gatts": {
    "min_sec_level": 0,       // Minimum security level for all attributes of all services.
                              // 0 - no auth required, 1 - encryption reqd, 2 - encryption + MITM reqd
    "require_pairing": false  // Require taht device is paired before accessing services
  }
}

Security

Default settings allow for unrestricted access: anyone can pair with a device and access the services. A better idea is to set bt.gatts.require_pairing to true, bt.allow_pairing to false and only enable it for a limited time via mgos_bt_gap_set_pairing_enable when user performs some action, e.g. presses a button. Raising bt.gatts.min_sec_level to at least 1 is also advisable. Note: At present, level 2 (MITM protection) is not usable as it requires device to have at least output capability during pairing, and there's no API for displaying the pairing code yet.

About

Common bits of Bluetooth support

Resources

License

Stars

Watchers

Forks

Packages

No packages published

Languages

  • C 95.9%
  • JavaScript 4.1%