SDK version 2.4.0
toolchains version 2.4.0
When try to run the Bluetooth: Peripheral UART Example on out of the box nrf52dk-nrf52832 dev boards (Two different dev boards) I get different outputs on RTT
on one board (lets called it Board "A") example is working as expected. means I can send and received data via UART. I use nrf connect on ios as central
below is the output from the RTT viewer
00> [00:00:00.015,136] <inf> fs_nvs: 6 Sectors of 4096 bytes
00> [00:00:00.015,197] <inf> fs_nvs: alloc wra: 0, fd0
00> [00:00:00.015,228] <inf> fs_nvs: data wra: 0, 1c
00> [00:00:00.015,472] <inf> bt_sdc_hci_driver: SoftDevice Controller build revision:
00> e0 7e 2e c1 5e 05 85 23 46 15 dc fa 8e 29 7d 70 |.~..^..# F....)}p
00> 10 93 a5 fc |....
00> [00:00:00.020,996] <inf> bt_hci_core: HW Platform: Nordic Semiconductor (0x0002)
00> [00:00:00.021,087] <inf> bt_hci_core: HW Variant: nRF52x (0x0002)
00> [00:00:00.021,118] <inf> bt_hci_core: Firmware: Standard Bluetooth controller (0x00) Version 224.11902 Build 2231721665
00> [00:00:00.022,033] <inf> bt_hci_core: No ID address. App must call settings_load()
00> [00:00:00.022,064] <inf> peripheral_uart: Bluetooth initialized
00> [00:00:00.023,284] <inf> bt_hci_core: Identi0m
00> [0m
00> [00:00:14.753,295] <inf> peripheral_uart: Connected 60:F2:57:81:71:A7 (random)
00> [00:00:15.077,728] <wrn> bt_l2cap: Ignoring data for unknown channel ID 0x003a
00> [00:00:27.836,364] <inf> peripheral_uart: Received data from: 60:F2:57:81:71:A7 (random)
00> [00:00:37.537,353] <inf> peripheral_uart: Received data from: 60:F2:57:81:71:A7 (random)
00> [00:00:00.015,197] <inf> fs_nvs: alloc wra: 0, fd0
00> [00:00:00.015,228] <inf> fs_nvs: data wra: 0, 1c
00> [00:00:00.015,472] <inf> bt_sdc_hci_driver: SoftDevice Controller build revision:
00> e0 7e 2e c1 5e 05 85 23 46 15 dc fa 8e 29 7d 70 |.~..^..# F....)}p
00> 10 93 a5 fc |....
00> [00:00:00.020,996] <inf> bt_hci_core: HW Platform: Nordic Semiconductor (0x0002)
00> [00:00:00.021,087] <inf> bt_hci_core: HW Variant: nRF52x (0x0002)
00> [00:00:00.021,118] <inf> bt_hci_core: Firmware: Standard Bluetooth controller (0x00) Version 224.11902 Build 2231721665
00> [00:00:00.022,033] <inf> bt_hci_core: No ID address. App must call settings_load()
00> [00:00:00.022,064] <inf> peripheral_uart: Bluetooth initialized
00> [00:00:00.023,284] <inf> bt_hci_core: Identi0m
00> [0m
00> [00:00:14.753,295] <inf> peripheral_uart: Connected 60:F2:57:81:71:A7 (random)
00> [00:00:15.077,728] <wrn> bt_l2cap: Ignoring data for unknown channel ID 0x003a
00> [00:00:27.836,364] <inf> peripheral_uart: Received data from: 60:F2:57:81:71:A7 (random)
00> [00:00:37.537,353] <inf> peripheral_uart: Received data from: 60:F2:57:81:71:A7 (random)
when I flash the other dev kit (Lets call this Board "B") with same hex, I'm getting the following out put when tried to received/transmit data
00> [00:00:00.015,319] <inf> fs_nvs: 6 Sectors of 4096 bytes
00> [00:00:00.015,380] <inf> fs_nvs: alloc wra: 0, fd0
00> [00:00:00.015,411] <inf> fs_nvs: data wra: 0, 1c
00> [00:00:00.015,655] <inf> bt_sdc_hci_driver: SoftDevice Controller build revision:
00> e0 7e 2e c1 5e 05 85 23 46 15 dc fa 8e 29 7d 70 |.~..^..# F....)}p
00> 10 93 a5 fc |....
00> [00:00:00.021,392] <inf> bt_hci_core: HW Platform: Nordic Semiconductor (0x0002)
00> [00:00:00.021,453] <inf> bt_hci_core: HW Variant: nRF52x (0x0002)
00> [00:00:00.021,514] <inf> bt_hci_core: Firmware: Standard Bluetooth controller (0x00) Version 224.11902 Build 2231721665
00> [00:00:00.022,430] <inf> bt_hci_core: No ID address. App must call settings_load()
00> [00:00:00.022,491] <inf> peripheral_uart: Bluetooth initialized
00> [00:00:00.023,742] <inf> bt_hci_core: Identi0m
00> [0m
00> [00:06:01.252,380] <inf> peripheral_uart: Connected 60:F2:57:81:71:A7 (random)
00> [00:06:01.549,774] <wrn> bt_l2cap: Ignoring data for unknown channel ID 0x003a
00> [00:06:27.959,472] <wrn> peripheral_uart: Failed to send data over BLE connection
00> [00:06:30.702,789] <wrn> peripheral_uart: Failed to send data over BLE connection
00> [00:00:00.015,380] <inf> fs_nvs: alloc wra: 0, fd0
00> [00:00:00.015,411] <inf> fs_nvs: data wra: 0, 1c
00> [00:00:00.015,655] <inf> bt_sdc_hci_driver: SoftDevice Controller build revision:
00> e0 7e 2e c1 5e 05 85 23 46 15 dc fa 8e 29 7d 70 |.~..^..# F....)}p
00> 10 93 a5 fc |....
00> [00:00:00.021,392] <inf> bt_hci_core: HW Platform: Nordic Semiconductor (0x0002)
00> [00:00:00.021,453] <inf> bt_hci_core: HW Variant: nRF52x (0x0002)
00> [00:00:00.021,514] <inf> bt_hci_core: Firmware: Standard Bluetooth controller (0x00) Version 224.11902 Build 2231721665
00> [00:00:00.022,430] <inf> bt_hci_core: No ID address. App must call settings_load()
00> [00:00:00.022,491] <inf> peripheral_uart: Bluetooth initialized
00> [00:00:00.023,742] <inf> bt_hci_core: Identi0m
00> [0m
00> [00:06:01.252,380] <inf> peripheral_uart: Connected 60:F2:57:81:71:A7 (random)
00> [00:06:01.549,774] <wrn> bt_l2cap: Ignoring data for unknown channel ID 0x003a
00> [00:06:27.959,472] <wrn> peripheral_uart: Failed to send data over BLE connection
00> [00:06:30.702,789] <wrn> peripheral_uart: Failed to send data over BLE connection
Rather than calling this a hardware issue and moved on, I would like to know why that the board B is partially functioning with Bluetooth stack.
I tried following troubleshooting steps
1. use nrf connect desktop programmer to read back the chip and compare the address regions - comparison is identical
2. use nrf52840dk to run Central UART example - results are identical to above except both boards are using security level 2
3. perform Mass Erase before reprogramming - same results as above
Any explanation/opinion , troubleshooting steps are much appreciated
Thanks
