https://devzone.nordicsemi.com/f/nordic-q-a/56043/using-serial-commands-is-not-supported-by-many-commandsI use nrf5_SDK_for_Mesh_v3.2.0_src\examples\serial and board pca10040. Supported commands. In [2]: for i in range(0, 10): send(cmd.Echo(&quot;Hello: &quot; + str(i))); time.sleep(1) 2019-12-30 10:19:11,041 - INFO - COM14: {event: DeviceEchoRsp, data: {&#39;dataen-USTelligent Community 13Mon, 30 Dec 2019 16:32:17 GMThttps://devzone.nordicsemi.com/thread/227101?ContentTypeID=1Mon, 30 Dec 2019 16:32:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1d10f57f-3da8-4361-9e8a-6428f973ade3Hung Bui<p>Hi John,&nbsp;</p> <p>Please continue to test the PyACI with the provisioning guide and the sending mesh packet:<a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.meshsdk.v4.0.0/md_scripts_interactive_pyaci_doc_demo_configuration.html?cp=7_2_2_6_1_2">https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.meshsdk.v4.0.0/md_scripts_interactive_pyaci_doc_demo_configuration.html?cp=7_2_2_6_1_2</a><br />The behaviour that you described is normal.&nbsp;&nbsp;<span>FwInfoGet() will return CMD_UNKNOWN, nothing is implemented for that command. See&nbsp;handle_cmd_device_fw_info_get() in serial_handler_device.c&nbsp;</span></p> <p><span>And the Enable() should return INVALID_STATE when it&#39;s not initialized.&nbsp;</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/227027?ContentTypeID=1Mon, 30 Dec 2019 05:30:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:96a4a70f-39eb-4812-9dd5-1b0134d0ba23john.liu<p>No change in source code.</p><div style="clear:both;"></div>