Hi. I'm brand new to Arduino and microcontrollers. I've just bought an Adafruit Feather nRF52840 Sense, and I'm having trouble getting started. I think I need to upload the bootloader. I plugged it into MacBook USB and the red D13 status LED flashes every 6 seconds. It does not appear as a disk.
I installed Arduino IDE v2.3.6, added the board URL https://adafruit.github.io/arduino-board-index/package_adafruit_index.json, installed the latest BSP for Adafruit nRF52 v1.7.0.
I have selected the board and the Port in the Tools menu. I read that I'm supposed to click Tools > Bootloader, but I don't have that option.
If I try Tools > Burn Bootloader, it fails with error:
Upgrading target on /dev/cu.usbmodemED9ACC47788F1 with DFU package /Users/ebalsley/Library/Arduino15/packages/adafruit/hardware/nrf52/1.7.0/bootloader/feather_nrf52840_sense/feather_nrf52840_sense_bootloader-0.9.1_s140_6.1.1.zip. Flow control is disabled, Dual bank, Touch 1200
Touched serial port /dev/cu.usbmodemED9ACC47788F1
Opened serial port /dev/cu.usbmodemED9ACC47788F1
Starting DFU upgrade of type 3, SoftDevice size: 151016, bootloader size: 39000, application size: 0
Sending DFU start packet
Timed out waiting for acknowledgement from device.
Failed to upgrade target. Error is: No data received on serial port. Not able to proceed.
Possible causes:
- Selected Bootloader version does not match the one on Bluefruit device.
Please upgrade the Bootloader or select correct version in Tools->Bootloader.
- Baud rate must be 115200, Flow control must be off.
- Target is not in DFU mode. Ground DFU pin and RESET and release both to enter DFU mode.
Traceback (most recent call last):
File "__main__.py", line 296, in serial
File "dfu/dfu.py", line 226, in dfu_send_images
File "dfu/dfu.py", line 199, in _dfu_send_image
File "dfu/dfu_transport_serial.py", line 179, in send_start_dfu
File "dfu/dfu_transport_serial.py", line 243, in send_packet
File "dfu/dfu_transport_serial.py", line 282, in get_ack_nr
nordicsemi.exceptions.NordicSemiException: No data received on serial port. Not able to proceed.
The first suggestion doesn't make sense to me, because I'm trying upgrade the bootloader now!
Second suggestion — I set 115200 baud in the serial monitor, but I don't know if that also applies to bootloader update procedure?
Third suggestion: I read that for this board, you're supposed to enter DFU mode by pressing reset button twice. When I do that, the red LED flashes a few times and then blue LED flashes once but nothing else happens.
If I open the serial monitor, I get a status readout every second:
Logging starts at block 1 of 511
Initializing Tag[6CDF9408] v0.021 @2481MHz ...
Accelerometer: x = 2457 y = -3444 z = 16039 at time 2 temp_lr 21.0 temp_hr_c 24.5 temp_hr_f 76.1 rel_hum 32.7
Accelerometer: x = 2402 y = -3496 z = 16033 at time 3 temp_lr 20.9 temp_hr_c 24.5 temp_hr_f 76.1 rel_hum 32.6
Accelerometer: x = 2426 y = -3483 z = 16019 at time 4 temp_lr 20.8 temp_hr_c 24.5 temp_hr_f 76.1 rel_hum 32.6
If I try to upload a basic sketch, it fails similarly:
Sketch uses 52388 bytes (6%) of program storage space. Maximum is 815104 bytes.
Global variables use 8752 bytes (3%) of dynamic memory, leaving 228816 bytes for local variables. Maximum is 237568 bytes.
Upgrading target on /dev/cu.usbmodemED9ACC47788F1 with DFU package /Users/ebalsley/Library/Caches/arduino/sketches/E062AE97FDCF1D99A8803147AE32EF58/sketch_oct27a.ino.zip. Flow control is disabled, Single bank, Touch disabled
Timed out waiting for acknowledgement from device.
Failed to upgrade target. Error is: No data received on serial port. Not able to proceed.
Possible causes:
- Selected Bootloader version does not match the one on Bluefruit device.
Please upgrade the Bootloader or select correct version in Tools->Bootloader.
- Baud rate must be 115200, Flow control must be off.
- Target is not in DFU mode. Ground DFU pin and RESET and release both to enter DFU mode.
Traceback (most recent call last):
File "__main__.py", line 296, in serial
File "dfu/dfu.py", line 235, in dfu_send_images
File "dfu/dfu.py", line 199, in _dfu_send_image
File "dfu/dfu_transport_serial.py", line 179, in send_start_dfu
File "dfu/dfu_transport_serial.py", line 243, in send_packet
File "dfu/dfu_transport_serial.py", line 282, in get_ack_nr
nordicsemi.exceptions.NordicSemiException: No data received on serial port. Not able to proceed.
Any help is appreciated!