Controlling a Trådfri bulb with nRF52840 - how to make it join?

Question

Hi, 
 I have an nRF52840 Development Kit, and am trying to control an IKEA Trådfri bulb. I'm following the commands from the SDK documentation , but it feels like they're missing a step, explaining how to make the bulb actually join the new network: 
 > bdb role zc Coordinator set Done > bdb start Started coordinator Done > bdb legacy enable Done > zdo match_desc 0xfffd 0xfffd 0xc05e 1 0 0 Sending broadcast request. > Done 
 Between enabling legacy mode and doing the match_desc, I toggle power to the bulb 6 times, to factory reset it. However, it still doesn't show up anywhere. 
 I've also tried changing the channel mask, so that all channels are used, as it's not clear to me which channel the Trådfri system is using, but that apparently has no effect. 
 What am I missing? How can I instruct the bulb to join my newly formed network?

Ole Morten · Accepted Answer

Hi again, 
 Writing a new reply, since the root cause turned out to not be what Marjeris Romero suggested, but a stupid mistake of my own. The short summary is that I needed to use gcc 7.2.1 instead of 9.2.1. 
 To give a bit more detail, I originally compiled the CLI example myself, but got two warnings: 
 ../../../../../../../../components/zigbee/cli/zigbee_cli_cmd_zdo.c: In function 'cmd_zb_simple_desc_req_cb':
../../../../../../../../components/zigbee/cli/zigbee_cli_cmd_zdo.c:277:52: warning: taking address of packed member of 'struct zb_af_simple_desc_1_1_s' may result in an unaligned pointer value [-Waddress-of-packed-member]
 277 | zb_uint16_t * p_cluster_list = (zb_uint16_t *)p_resp->simple_desc.app_cluster_list;
 | ^~~~~~
../../../../../../../../components/zigbee/cli/zigbee_cli_cmd_zdo.c: In function 'cmd_zb_match_desc':
../../../../../../../../components/zigbee/cli/zigbee_cli_cmd_zdo.c:789:79: warning: taking address of packed member of 'struct zb_zdo_match_desc_param_s' may result in an unaligned pointer value [-Waddress-of-packed-member]
 789 | if (!sscan_cluster_list(argv + 5, p_req->num_in_clusters, (uint16_t *)p_req->cluster_list)) 
 I looked at the code, but concluded that there wasn't any clear, easy fixes, so I just removed -Werror, assuming that this was a inconsequential warning that had somehow snuck past the release checks, without thinking more of it (MCU vendors supplying code with warnings is unfortunately not unheard of, although I was a bit surprised Nordic would do so). 
 However, after reading the answers, I realized I could test with an outlet instead of a bulb, since those are easier to factory reset (holding the button for 5 s). This unfortunately still didn't work, but it then struck me that I had never tried the precompiled hex files, so and when doing so it turned out the outlet was immediately joined. 
 Seeing that, I suddenly realized I was using a different compiler version than the SDK was supposed to be used with: arm-none-eabi-gcc 2019-q4 (9.2.1), from the Ubuntu repos. instead of 2018-q1 (7.2.1), originally referred to in Makefile.posix. 
 I therefore went back and downloaded 7.2.1 myself, and when recompiling with that, the warnings went away and the CLI worked as expected. Testing further, I also discovered that the example works when recompiling with 9.2.1 but without -Os. 
 The conclusion hence seems to be that there is some optimization that 9.2.1 does when compiled with -Os that causes the example to not work, and it's seems likely to be related to the warning given above. This hence may be worth fixing in a future SDK update. 
 Thanks for the help!

Controlling a Trådfri bulb with nRF52840 - how to make it join?

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