Send large BLE host frames across multiple notifies.

Prefer ATT MTU 517 and chunk oversized responses so CLIENT_INFO/BATTERY work with many pods; reset the goTool parser after timeouts so partial frames do not poison the next exchange.

Co-authored-by: Cursor <cursoragent@cursor.com>

goTool/ble_link.go

@@ -22,6 +22,7 @@ type bleLink struct {
 	device   bluetooth.Device
 	char     bluetooth.DeviceCharacteristic
 	mu       sync.Mutex
+	parserMu sync.Mutex
 	parser   *uartframe.Parser
 	respCh   chan []byte
 	streamCh chan []byte
@@ -162,6 +163,8 @@ func connectBLEDevice(addr bluetooth.Address, settle time.Duration) (*bleLink, e
 }
 
 func (b *bleLink) onNotify(buf []byte) {
+	b.parserMu.Lock()
+	defer b.parserMu.Unlock()
 	for _, by := range buf {
 		payload, ok, err := b.parser.Feed(by)
 		if err != nil || !ok {
@@ -195,6 +198,12 @@ func (b *bleLink) onNotify(buf []byte) {
 	}
 }
 
+func (b *bleLink) resetParser() {
+	b.parserMu.Lock()
+	b.parser = uartframe.NewParser()
+	b.parserMu.Unlock()
+}
+
 func (b *bleLink) Close() error {
 	return b.device.Disconnect()
 }
@@ -243,6 +252,9 @@ sent:
 	for {
 		remain := time.Until(deadline)
 		if remain <= 0 {
+			// Drop a half-parsed frame (e.g. aborted multi-notify) so the next
+			// exchange does not treat a new 0xAA as payload data.
+			b.resetParser()
 			return nil, fmt.Errorf("BLE read timeout for %s (check DIP8=BLE / -ble)", cmdName)
 		}
 		timer := time.NewTimer(remain)
@@ -264,6 +276,7 @@ sent:
 			}
 			return resp, nil
 		case <-timer.C:
+			b.resetParser()
 			return nil, fmt.Errorf("BLE read timeout for %s (check DIP8=BLE / -ble)", cmdName)
 		}
 	}