diff --git a/ble/services/BleProtocolService.ts b/ble/services/BleProtocolService.ts
index 2051353..119b4da 100644
--- a/ble/services/BleProtocolService.ts
+++ b/ble/services/BleProtocolService.ts
@@ -169,6 +169,8 @@ export class BleProtocolService {
         console.debug(`Sending ${total} frames`);
         for (let i = 0; i < total; i++) {
             const frame = frames[i];
+            if (i < 5)
+                console.debug("raw frame \n", Array.from(frame).map(b => b.toString(16).padStart(2, '0')).join(' '));
             console.debug(`Writing frame ${i + 1}/${total}, length = ${frame.length}`);
             const base64 = Buffer.from(frame).toString('base64');
             const result = await this.client.write(deviceId, BLE_UUIDS.SERVICE, BLE_UUIDS.WRITE_CHARACTERISTIC, base64, false);