@Arthur I did a scan with an Ubertooth One laying around, just to confirm that my embc02 is working and to trace the exact content of its advertisements (hope will be useful for someone). systime=1503417955 freq=2402 addr=8e89bed6 delta_t=1008.339 ms rssi=-39 02 25 b4 46 0b ee f3 0c 0f 09 45 4d 42 65 61 63 6f 6e 31 38 30 39 31 00 0e ff 5a 00 bf f8 30 32 29 00 07 d2 e1 c0 01 23 21 3f Advertising / AA 8e89bed6 (valid)/ 37 bytes Channel Index: 37 Type: ADV_NONCONN_IND AdvA: 0c:f3:ee:0b:46:b4 (public) AdvData: 0f 09 45 4d 42 65 61 63 6f 6e 31 38 30 39 31 00 0e ff 5a 00 bf f8 30 32 29 00 07 d2 e1 c0 01 Type 09 (Complete Local Name) EMBeacon18091. Type ff (Manufacturer Specific Data) Company: EM Microelectronic-Marin SA Data: bf f8 30 32 29 00 07 d2 e1 c0 01 Data: b4 46 0b ee f3 0c 0f 09 45 4d 42 65 61 63 6f 6e 31 38 30 39 31 00 0e ff 5a 00 bf f8 30 32 29 00 07 d2 e1 c0 01 CRC: 23 21 3f systime=1503417956 freq=2402 addr=8e89bed6 delta_t=1002.886 ms rssi=-40 02 25 b4 46 0b ee f3 0c 0f 09 45 4d 42 65 61 63 6f 6e 31 38 30 39 31 00 0e ff 5a 00 bf f8 30 32 29 00 07 d2 e2 c0 01 d1 91 99 Advertising / AA 8e89bed6 (valid)/ 37 bytes Channel Index: 37 Type: ADV_NONCONN_IND AdvA: 0c:f3:ee:0b:46:b4 (public) AdvData: 0f 09 45 4d 42 65 61 63 6f 6e 31 38 30 39 31 00 0e ff 5a 00 bf f8 30 32 29 00 07 d2 e2 c0 01 Type 09 (Complete Local Name) EMBeacon18091. Type ff (Manufacturer Specific Data) Company: EM Microelectronic-Marin SA Data: bf f8 30 32 29 00 07 d2 e2 c0 01 Data: b4 46 0b ee f3 0c 0f 09 45 4d 42 65 61 63 6f 6e 31 38 30 39 31 00 0e ff 5a 00 bf f8 30 32 29 00 07 d2 e2 c0 01 CRC: d1 91 99 systime=1503417957 freq=2402 addr=8e89bed6 delta_t=1002.474 ms rssi=-40 02 25 b4 46 0b ee f3 0c 0f 09 45 4d 42 65 61 63 6f 6e 31 38 30 39 31 00 0e ff 5a 00 bf f8 30 32 29 00 07 d2 e3 c0 01 80 41 68 Advertising / AA 8e89bed6 (valid)/ 37 bytes Channel Index: 37 Type: ADV_NONCONN_IND AdvA: 0c:f3:ee:0b:46:b4 (public) AdvData: 0f 09 45 4d 42 65 61 63 6f 6e 31 38 30 39 31 00 0e ff 5a 00 bf f8 30 32 29 00 07 d2 e3 c0 01 Type 09 (Complete Local Name) EMBeacon18091. Type ff (Manufacturer Specific Data) Company: EM Microelectronic-Marin SA Data: bf f8 30 32 29 00 07 d2 e3 c0 01 Data: b4 46 0b ee f3 0c 0f 09 45 4d 42 65 61 63 6f 6e 31 38 30 39 31 00 0e ff 5a 00 bf f8 30 32 29 00 07 d2 e3 c0 01 CRC: 80 41 68 Logged in GitHub as https://github.com/pycom/pycom-micropython-sigfox/issues/54