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openhaystack: store battery status in FindMy packet 

See also:
  https://github.com/seemoo-lab/openhaystack/issues/185
  e5a678e33d/FindMyFlipper/findmy_state.c (L126-L137)

From https://github.com/biemster/FindMy/issues/53
  Advertising byte:
    ?xx1rrmrr
    r: reserved
    m: maintained
    x: can be set. x must be:
      00: full
      01: medium
      10: low
      11: critical

  this doesn't seem to correspond with the above links
master
Rob Pilling 2024-05-24 18:01:49 +01:00
parent 4d8c46ba51
commit 924f96300f
3 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
apps/openhaystack/ChangeLog
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@ -1,3 +1,4 @@
0.01: New App! 0.01: New App!
0.02: Keep advertising when connected 0.02: Keep advertising when connected
0.03: Use ble_advert module to work with other BLE advert apps 0.03: Use ble_advert module to work with other BLE advert apps
0.04: Update battery status in advertising packet

7
apps/openhaystack/custom.html
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@ -38,7 +38,12 @@ https://github.com/seemoo-lab/openhaystack/issues/59#issuecomment-1303236903
{ {
const key = E.toUint8Array(atob(${JSON.stringify(keyValue)})); // public key const key = E.toUint8Array(atob(${JSON.stringify(keyValue)})); // public key
const mac = [ key[0] | 0b11000000, key[1], key[2], key[3], key[4], key[5] ].map(x => x.toString(16).padStart(2, '0')).join(':'); // mac address const mac = [ key[0] | 0b11000000, key[1], key[2], key[3], key[4], key[5] ].map(x => x.toString(16).padStart(2, '0')).join(':'); // mac address
const adv = [ 0x1e, 0xff, 0x4c, 0x00, 0x12, 0x19, 0x00, key[6], key[7], key[8], key[9], key[10], key[11], key[12], key[13], key[14], key[15], key[16], key[17], key[18], key[19], key[20], key[21], key[22], key[23], key[24], key[25], key[26], key[27], key[0] >> 6, 0x00 ]; // advertising packet let batt = E.getBattery();
if (batt > 80) batt = 0x0; // full
else if (batt > 50) batt = 0x50; // medium
else if (batt > 20) batt = 0xa0; // low
else batt = 0xf0; // critical
const adv = [ 0x1e, 0xff, 0x4c, 0x00, 0x12, 0x19, batt, key[6], key[7], key[8], key[9], key[10], key[11], key[12], key[13], key[14], key[15], key[16], key[17], key[18], key[19], key[20], key[21], key[22], key[23], key[24], key[25], key[26], key[27], key[0] >> 6, 0x00 ]; // advertising packet
NRF.setAddress(mac); NRF.setAddress(mac);
require("ble_advert").push(adv, {whenConnected: true, interval: 1000}); // advertise AirTag *and* normal device name (to remain connectable) require("ble_advert").push(adv, {whenConnected: true, interval: 1000}); // advertise AirTag *and* normal device name (to remain connectable)
} }

2
apps/openhaystack/metadata.json
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@ -1,7 +1,7 @@
{ "id": "openhaystack", { "id": "openhaystack",
"name": "OpenHaystack (AirTag)", "name": "OpenHaystack (AirTag)",
"icon": "icon.png", "icon": "icon.png",
"version":"0.03", "version":"0.04",
"description": "Copy a base64 key from https://github.com/seemoo-lab/openhaystack and make your Bangle.js trackable as if it's an AirTag", "description": "Copy a base64 key from https://github.com/seemoo-lab/openhaystack and make your Bangle.js trackable as if it's an AirTag",
"tags": "openhaystack,bluetooth,ble,tracking,airtag", "tags": "openhaystack,bluetooth,ble,tracking,airtag",
"type": "bootloader", "type": "bootloader",