# Available ports **URL:** \ **Category:** Dev Kit Support\ **Created:** [December 15, 2024, 8:08pm UTC](https://bristlemouth.discourse.group/t/available-ports/458 "2024-12-15T20:08:39Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![jagdish](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@jagdish](https://bristlemouth.discourse.group/u/jagdish)\ **Post date:** [December 15, 2024, 8:08pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/1 "2024-12-15T20:08:39Z")
I see only port 1 as available with cmd “python3 -m serial” . Guide indicates that 5 ports should be available. What am I doing wrong? Thanks ---
**Author:** ![matt001k](https://yyz1.discourse-cdn.com/flex029/user_avatar/bristlemouth.discourse.group/matt001k/32/497_2.png) [@matt001k](https://bristlemouth.discourse.group/u/matt001k)\ **Post date:** [December 16, 2024, 5:41pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/2 "2024-12-16T17:41:13Z")
Hello @jagdish, if you look a bit closer at the associated section in [Getting Started](https://bristlemouth.notion.site/Bristlemouth-Dev-Kit-Guide-1-Getting-Started-ae1b352777414317915257ccb65f59c0?pvs=97#de77783959124c3a8da08158d8506fbd), it states there are two Bristlemouth serial ports: ![Screenshot 2024-12-16 at 9.36.13 AM](https://canada1.discourse-cdn.com/flex029/uploads/bristlemouth/original/1X/8a1aef82708c08503c5da658caf3660f81009ac1.jpeg) Steps 3 and 4 of that section of guide explain which port to connect to: ![Screenshot 2024-12-16 at 9.38.04 AM](https://canada1.discourse-cdn.com/flex029/uploads/bristlemouth/original/1X/eebceb19ca3927581c1add58f73e0eb91d9119b9.jpeg) Would you be able to share a bit more information on what port you are seeing, whether or not it matches one of the labelled “Bristlemouth” ports on the screenshots shared above, and the previous steps you have taken in order to see that port? ---
**Author:** ![jagdish](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@jagdish](https://bristlemouth.discourse.group/u/jagdish)\ **Post date:** [December 16, 2024, 6:43pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/3 "2024-12-16T18:43:05Z")
Hi, Thanks for getting back. Here’s a screenshot - Jagdishs-MBP:~ jagdishgirimaji$ python3 -m serial — Available ports: — 1: /dev/cu.Bluetooth-Incoming-Port ‘n/a’ — Enter port index or full name: I do not see ports 2-5. ---
**Author:** ![matt001k](https://yyz1.discourse-cdn.com/flex029/user_avatar/bristlemouth.discourse.group/matt001k/32/497_2.png) [@matt001k](https://bristlemouth.discourse.group/u/matt001k)\ **Post date:** [December 16, 2024, 7:08pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/4 "2024-12-16T19:08:14Z")
@jagdish, thanks for sharing. It looks like you are not able to view the development kit using pyserial. A few questions: 1. Is the board supplied power as mentioned in [step 2 of the Communicating with the Dev Kit over a USB serial connection](https://bristlemouth.notion.site/Bristlemouth-Dev-Kit-Guide-1-Getting-Started-ae1b352777414317915257ccb65f59c0?pvs=97#7e237b78fc1d4dd0a0cae7ec2b1747ed) section of the Getting Started guide? Have you seen the LED blinking Green after powering up the board? 2. Is the development kit connected to the PC you are attempting talk with over serial with a USB-C cable? 3. If answered yes to 2, have you tried another USB-C cable to rule out a faulty cable? ---
**Author:** ![jagdish](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@jagdish](https://bristlemouth.discourse.group/u/jagdish)\ **Post date:** [December 16, 2024, 7:23pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/5 "2024-12-16T19:23:02Z")
Hi Matthew, Yes to 1 & 2. No to 3. I have ordered a few new USB C data cables, arriving today & will try that as soon as I get them. ---
**Author:** ![jagdish](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@jagdish](https://bristlemouth.discourse.group/u/jagdish)\ **Post date:** [December 17, 2024, 4:34am UTC](https://bristlemouth.discourse.group/t/available-ports/458/6 "2024-12-17T04:34:15Z")
Hi Matthew, I got a new set of USB-C cables and tried with no luck. Running “python3 -m serial” shows port 1 available. Same as before. Thanks, Jagdish ---
**Author:** ![matt001k](https://yyz1.discourse-cdn.com/flex029/user_avatar/bristlemouth.discourse.group/matt001k/32/497_2.png) [@matt001k](https://bristlemouth.discourse.group/u/matt001k)\ **Post date:** [December 17, 2024, 6:19pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/7 "2024-12-17T18:19:38Z")
@jagdish it looks like you are using a Mac. Would you be able to check if you can see the device, and send a screenshot of the output, by running the command: ```auto ls /dev/cu.* ``` This could helpfully rule out if it is a Mac issue or an issue with python. Are you connecting the cable directly to you Mac or is there a hub in between? This could be a potential issue if so, try connecting it directly to your Mac. Another troubleshooting step would be to attempt to see the device on another computer if available: - The [following](https://www.taltech.com/support/identify-com-port/) is a good guide to check if you can see a serial device on Windows. - If you have access to a Linux machine, I would attempt to follow the getting started guide again and see if it works on that platform ---
**Author:** ![jagdish](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@jagdish](https://bristlemouth.discourse.group/u/jagdish)\ **Post date:** [December 17, 2024, 9:32pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/8 "2024-12-17T21:32:42Z")
Thanks for your guidance. I was able to resolve the issue. I now have the following - — Available ports: — 1: /dev/cu.Bluetooth-Incoming-Port ‘n/a’ — 2: /dev/cu.usbmodem0000078EB72E1 ‘Bristlemouth’ — 3: /dev/cu.usbmodem0000078EB72E3 ‘Bristlemouth’ — Enter port index or full name: 2 — Miniterm on /dev/cu.usbmodem0000078EB72E1 9600,8,N,1 — — Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H — hum\_temp | tick: 294188, rtc: 0, hum: 38.582932, temp: 22.717409 pressure | tick: 294199, rtc: 0, temp: 22.713987, pressure: 1007.625122 power | tick: 294206, rtc: 0, addr: 67, voltage: 0.001600, current: -0.000250 power | tick: 294208, rtc: 0, addr: 65, voltage: 23.731199, current: -0.000250 hum\_temp | tick: 296188, rtc: 0, hum: 38.610573, temp: 22.714920 pressure | tick: 296199, rtc: 0, temp: 22.708075, pressure: 1007.632324 I will now move to section 2 & get back if I run into any issues. Thanks a lot. Can you pls point me to docs, videos you may have to understand the technology, especially 2 wire communication. Jagdish ---
**Author:** ![matt001k](https://yyz1.discourse-cdn.com/flex029/user_avatar/bristlemouth.discourse.group/matt001k/32/497_2.png) [@matt001k](https://bristlemouth.discourse.group/u/matt001k)\ **Post date:** [December 17, 2024, 9:59pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/9 "2024-12-17T21:59:10Z")
Sure thing! [Here](https://bristlemouth.notion.site/1-0-0-95242ccc8f4f47268be725ce6f1d0387) is the page for the spec on Bristlemouth. Click the download link to obtain the full document. ---
**Author:** ![jagdish](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@jagdish](https://bristlemouth.discourse.group/u/jagdish)\ **Post date:** [December 18, 2024, 5:39am UTC](https://bristlemouth.discourse.group/t/available-ports/458/10 "2024-12-18T05:39:46Z")
When I run ‘bm topo’ I get the following error - Jagdishs-MBP:~ jagdishgirimaji$ bm topo -bash: bm: command not found How do I proceed? ---
**Author:** ![jagdish](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@jagdish](https://bristlemouth.discourse.group/u/jagdish)\ **Post date:** [December 18, 2024, 5:53am UTC](https://bristlemouth.discourse.group/t/available-ports/458/11 "2024-12-18T05:53:52Z")
Some more context. I was able to run ‘python3 -m serial’ and get telemetry data continuously. Then I stopped using CTRL] & then ran ‘bm topo’ which returned the error msg ‘command not found’ ---
**Author:** ![matt001k](https://yyz1.discourse-cdn.com/flex029/user_avatar/bristlemouth.discourse.group/matt001k/32/497_2.png) [@matt001k](https://bristlemouth.discourse.group/u/matt001k)\ **Post date:** [December 18, 2024, 5:18pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/12 "2024-12-18T17:18:05Z")
You need to run the specified commands while in the serial terminal. So the steps in your case would be: 1. Run `python -m serial` and connect to the device 2. Send the command `bm topo` Do not exit the serial terminal with `ctrl + ]` if you wish to send commands to the device. ---
**Author:** ![jagdish](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@jagdish](https://bristlemouth.discourse.group/u/jagdish)\ **Post date:** [December 18, 2024, 8:50pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/13 "2024-12-18T20:50:28Z")
the telemetry data does not stop, not sure how to pause. I have tried to run ‘bm topo’ but the screen keeps updating with pressure, temp data. ---
**Author:** ![jagdish](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@jagdish](https://bristlemouth.discourse.group/u/jagdish)\ **Post date:** [December 19, 2024, 12:45am UTC](https://bristlemouth.discourse.group/t/available-ports/458/14 "2024-12-19T00:45:56Z")
how do i stop the serial sensor readings to continuously stream on the terminal and get the `>` prompt to run the commands. As you can see I pasted bm topo (highlighted below) and was able to get the right response but telemetry data is streaming. Jagdishs-MBP:~ jagdishgirimaji$ python3 -m serial.tools.miniterm /dev/cu.usbmodem0000078EB72E1 9600 — Miniterm on /dev/cu.usbmodem0000078EB72E1 9600,8,N,1 — — Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H — hum\_temp | tick: 32210188, rtc: 2024-12-19T00:34:38.000, hum: 42.945400, temp: 21.416050 pressure | tick: 32210199, rtc: 2024-12-19T00:34:38.011, temp: 21.411383, pressure: 1003.869080 power | tick: 32210206, rtc: 2024-12-19T00:34:38.019, addr: 67, voltage: 0.001600, current: -0.000250 power | tick: 32210208, rtc: 2024-12-19T00:34:38.019, addr: 65, voltage: 23.939199, current: -0.000250 hum\_temp | tick: 32212188, rtc: 2024-12-19T00:34:40.000, hum: 43.027935, temp: 21.413561 pressure | tick: 32212199, rtc: 2024-12-19T00:34:40.011, temp: 21.412004, pressure: 1003.858154 power | tick: 32212206, rtc: 2024-12-19T00:34:40.019, addr: 67, voltage: 0.001600, current: -0.000250 power | tick: 32212208, rtc: 2024-12-19T00:34:40.019, addr: 65, voltage: 23.939199, current: -0.000250 **bm topo** **(root)05dde5d0078eb72e:1 | 1:e3ceca5d38a2dda9** Set RTC to 2024-12-19T00:34:42.875 hum\_temp | tick: 32214188, rtc: 2024-12-19T00:34:42.003, hum: 42.939789, temp: 21.405781 pressure | tick: 32214199, rtc: 2024-12-19T00:34:42.011, temp: 21.406094, pressure: 1003.856873 power | tick: 32214206, rtc: 2024-12-19T00:34:42.019, addr: 67, voltage: 0.001600, current: -0.000250 power | tick: 32214208, rtc: 2024-12-19T00:34:42.023, addr: 65, voltage: 23.939199, current: 0.000000 hum\_temp | tick: 32216188, rtc: 2024-12-19T00:34:44.003, hum: 43.220551, temp: 21.405470 pressure | tick: 32216199, rtc: 2024-12-19T00:34:44.011, temp: 21.412628, pressure: 1003.862549 power | tick: 32216206, rtc: 2024-12-19T00:34:44.019, addr: 67, voltage: 0.001600, current: -0.000250 power | tick: 32216208, rtc: 2024-12-19T00:34:44.023, addr: 65, voltage: 23.939199, current: -0.000250 — exit — Jagdishs-MBP:~ jagdishgirimaji$ ---
**Author:** ![matt001k](https://yyz1.discourse-cdn.com/flex029/user_avatar/bristlemouth.discourse.group/matt001k/32/497_2.png) [@matt001k](https://bristlemouth.discourse.group/u/matt001k)\ **Post date:** [December 19, 2024, 6:00pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/15 "2024-12-19T18:00:02Z")
@jagdish the console print statements are constantly streaming as of current and will not stop. The keystrokes you enter in to the console are read and interpreted. ---
**Author:** ![jagdish](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@jagdish](https://bristlemouth.discourse.group/u/jagdish)\ **Post date:** [December 19, 2024, 7:51pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/16 "2024-12-19T19:51:01Z")
Thanks. I have got past that hurdle. Now I am directly connected to Spotter & running ‘python3 -m serial’ returns the following - Jagdishs-MBP:~ jagdishgirimaji$ python3 -m serial — Available ports: — 1: /dev/cu.Bluetooth-Incoming-Port ‘n/a’ — 2: /dev/cu.usbmodemSPOT\_32074C1 ‘Spotter’ — Enter port index or full name: The guide says I should be seeing a longer list of possible ports. Why am I not? ---
**Author:** ![matt001k](https://yyz1.discourse-cdn.com/flex029/user_avatar/bristlemouth.discourse.group/matt001k/32/497_2.png) [@matt001k](https://bristlemouth.discourse.group/u/matt001k)\ **Post date:** [December 20, 2024, 12:32am UTC](https://bristlemouth.discourse.group/t/available-ports/458/17 "2024-12-20T00:32:26Z")
If you are attempting to connect to spotter, the only port you need be concerned with is port 2 here labeled `Spotter`. ---
**Author:** ![jagdish](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@jagdish](https://bristlemouth.discourse.group/u/jagdish)\ **Post date:** [January 3, 2025, 4:44pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/18 "2025-01-03T16:44:55Z")
Hi Matthew, I have made quite a bit of progress and am in section 5, part 2b. The issue I am facing now is I am not able to update FW to SD card. I have successfully compiled the code and copied the …elf.bin file to the root directory in SD card and after re-inserting and running it keeps executing from the previous build hence I cannot chk the changes. I want to stay with updating FW via SD card. Thanks, Jagdish ---
**Author:** ![matt001k](https://yyz1.discourse-cdn.com/flex029/user_avatar/bristlemouth.discourse.group/matt001k/32/497_2.png) [@matt001k](https://bristlemouth.discourse.group/u/matt001k)\ **Post date:** [January 3, 2025, 6:06pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/19 "2025-01-03T18:06:24Z")
Hello @jagdish, To flash the dev kit through the spotter’s SD card I recommend taking a look at the following [guide](https://bristlemouth.notion.site/Bristlemouth-Dev-Kit-Guide-3-Exploring-Bristlemouth-Features-09f65c9a854240c9ab0f84bf64008479?pvs=97#d71ce6b728964e8eb5bcc91c5275a39d). Note that the file from the build directory you want to flash ends with `.elf.dfu.bin`. Can you please walk me through the steps done to try and flash the dev kit with an SD card? ---
**Author:** ![jagdish](https://avatars.discourse-cdn.com/v4/letter/j/96bed5/32.png) [@jagdish](https://bristlemouth.discourse.group/u/jagdish)\ **Post date:** [January 3, 2025, 6:32pm UTC](https://bristlemouth.discourse.group/t/available-ports/458/20 "2025-01-03T18:32:47Z")
I have tried flashing .elf.dfu.bin and dbg.elf.bin and neither have worked. In guide 3, under “Updating the Dev kit Firmware” it says use .elf.dfu.bin. But in guide 5 section 01, it asks to use .elf.dfu.bin. This is the process I used: - Made changes to code in visual studio. Saved changes made. - Compiled using ‘make -j’ cmd & got 100% Built - Ejected SD card from Spotter - Inserted SD card into laptop & copied .elf.dfu.bin to root directory on SD card - Safely ejected SD card from laptop and inserted into Spotter - Spotter reboots - On Dev Kit serial port ran "python3 -m serial’ to see results. This is where it seems to be executing the last code [Next page](https://bristlemouth.discourse.group/t/available-ports/458.md?page=2)