# Firmware **URL:** https://discuss.blues.com/c/firmware/13.md [Latest](https://discuss.blues.com/latest.md) · [Categories](https://discuss.blues.com/categories.md) · [Tags](https://discuss.blues.com/tags.md) --- ## [About the Firmware category](https://discuss.blues.com/t/about-the-firmware-category/22)
**Author:** [@bsatrom](https://discuss.blues.com/u/bsatrom)\ **Replies:** 0
--- ## [Notecard NBGLN not updating to the latest FW](https://discuss.blues.com/t/notecard-nbgln-not-updating-to-the-latest-fw/3634)
**Author:** [@rberkelm](https://discuss.blues.com/u/rberkelm)\ **Replies:** 1\ **Last updated:** [September 15, 2026, 4:01pm UTC](https://discuss.blues.com/t/notecard-nbgln-not-updating-to-the-latest-fw/3634 "2026-09-15T16:01:56Z")
I have a Notecard NBGLN which I am commissioning fresh out of the box. It came with FW 9.3.1.17434 and in the In-browser terminal, I successful ran the command firmware install latest. However, it upgraded to FW 11.2.2, … --- ## [Note-emu - a drop-in virtual notecard library for note-c and note-cpp \[community project\]](https://discuss.blues.com/t/note-emu-a-drop-in-virtual-notecard-library-for-note-c-and-note-cpp-community-project/3605)
**Author:** [@mdma](https://discuss.blues.com/u/mdma)\ **Replies:** 1\ **Last updated:** [July 29, 2026, 7:22am UTC](https://discuss.blues.com/t/note-emu-a-drop-in-virtual-notecard-library-for-note-c-and-note-cpp-community-project/3605 "2026-07-29T07:22:54Z")
Hi all :waving\_hand: Following on from note-cpp, I’d like to share note-emu — a virtual Notecard you can use before your hardware arrives, or as part of your integration tests once it does. It’s a drop-in transport for… --- ## [Max body for a Note](https://discuss.blues.com/t/max-body-for-a-note/3534)
**Author:** [@JacobDPoland](https://discuss.blues.com/u/JacobDPoland)\ **Replies:** 2\ **Last updated:** [June 24, 2026, 3:41pm UTC](https://discuss.blues.com/t/max-body-for-a-note/3534 "2026-06-24T15:41:21Z")
I’m wondering what is the maximum length of a body in a note? I noticed my uploads work with a body length of 972, but fail when I add one more sensor-worth of data. I am not sure what the body length of the failures are… --- ## [Notecard time not updating](https://discuss.blues.com/t/notecard-time-not-updating/3553)
**Author:** [@rberkelm](https://discuss.blues.com/u/rberkelm)\ **Replies:** 7\ **Last updated:** [June 13, 2026, 11:22pm UTC](https://discuss.blues.com/t/notecard-time-not-updating/3553 "2026-06-13T23:22:02Z")
I have a Notecard + Starnote on the test bench that does not seem to update the Notecard time. The Notecard and Starnote both run the latest FW (v11.2.2 and v11.2.1 resp.). When I became aware of this, I restarted the No… --- ## [Notecard Error Stability for UID](https://discuss.blues.com/t/notecard-error-stability-for-uid/3509)
**Author:** [@ozaer777](https://discuss.blues.com/u/ozaer777)\ **Replies:** 2\ **Last updated:** [March 27, 2026, 9:00am UTC](https://discuss.blues.com/t/notecard-error-stability-for-uid/3509 "2026-03-27T09:00:45Z")
Hi there, I’ve been debugging my Arduino code handling hub.sync.status responses over serial. I noticed that when an invalid Product UID is used, the Notecard returns an “alert”:true flag along with a specific error str… --- ## [Template persistance](https://discuss.blues.com/t/template-persistance/3505)
**Author:** [@richf](https://discuss.blues.com/u/richf)\ **Replies:** 1\ **Last updated:** [March 23, 2026, 2:20pm UTC](https://discuss.blues.com/t/template-persistance/3505 "2026-03-23T14:20:35Z")
Hi, If I use the Blues (internal) USB Browser to create a template, will that template persist through power cycles? If a program modifies the template, do the changes get written back to the “Browser” storage? thanks,… --- ## [Is IAP Host DFU restricted to I2C?](https://discuss.blues.com/t/is-iap-host-dfu-restricted-to-i2c/3497)
**Author:** [@Jakov](https://discuss.blues.com/u/Jakov)\ **Replies:** 3\ **Last updated:** [March 13, 2026, 8:20am UTC](https://discuss.blues.com/t/is-iap-host-dfu-restricted-to-i2c/3497 "2026-03-13T08:20:33Z")
Hi Blues team, We are using request-response over I2C, however, we were wondering if the IAP Host DFU payload transactions could be offloaded to an UART interface. I see that there are two UART interfaces available on … --- ## [Bootloader for OTA Updates](https://discuss.blues.com/t/bootloader-for-ota-updates/3491)
**Author:** [@jbro](https://discuss.blues.com/u/jbro)\ **Replies:** 3\ **Last updated:** [March 11, 2026, 7:17pm UTC](https://discuss.blues.com/t/bootloader-for-ota-updates/3491 "2026-03-11T19:17:13Z")
I’m using the Adafruit Feather nRF52840 Express (Product ID 4062) with the Arduino IDE (Adafruit nRF52 core) and trying to implement over-the-air firmware updates using a Blues Notecard and Notehub. When I export compil… --- ## [Clarification on DFU binpacks for mcuboot](https://discuss.blues.com/t/clarification-on-dfu-binpacks-for-mcuboot/3437)
**Author:** [@scase](https://discuss.blues.com/u/scase)\ **Replies:** 3\ **Last updated:** [February 2, 2026, 3:32pm UTC](https://discuss.blues.com/t/clarification-on-dfu-binpacks-for-mcuboot/3437 "2026-02-02T15:32:12Z")
I’m troubleshooting an issue related to DFU failures using the mcuboot bootloader, and I wanted to ask a clarifying question: When I follow the steps outline here to build the project and use the Notecard CLI to create … --- ## [Determining the correct "target" value when retrieving notecard firmware](https://discuss.blues.com/t/determining-the-correct-target-value-when-retrieving-notecard-firmware/3391)
**Author:** [@devElert](https://discuss.blues.com/u/devElert)\ **Replies:** 2\ **Last updated:** [November 24, 2025, 2:25pm UTC](https://discuss.blues.com/t/determining-the-correct-target-value-when-retrieving-notecard-firmware/3391 "2025-11-24T14:25:33Z")
The /firmware API supports a target parameter, which filters the returned Notecard firmwares by the target type. Is there a way host firmware can determine the correct value of target from the Notecard? --- ## [Is Notecard FW update currently impossible?](https://discuss.blues.com/t/is-notecard-fw-update-currently-impossible/3364)
**Author:** [@scase](https://discuss.blues.com/u/scase)\ **Replies:** 7\ **Last updated:** [November 11, 2025, 5:11pm UTC](https://discuss.blues.com/t/is-notecard-fw-update-currently-impossible/3364 "2025-11-11T17:11:59Z")
We’re having trouble getting Notecards up to the latest LTS firmware. If we try to update them through Notehub, it normally fails due to MD5 check error, which requires changing to a different firmware version to clear o… --- ## [Cygnet issue with ModbusMaster](https://discuss.blues.com/t/cygnet-issue-with-modbusmaster/3223)
**Author:** [@rfadell3](https://discuss.blues.com/u/rfadell3)\ **Replies:** 6\ **Last updated:** [September 26, 2025, 6:44pm UTC](https://discuss.blues.com/t/cygnet-issue-with-modbusmaster/3223 "2025-09-26T18:44:34Z")
I’m running into an issue where our Cygnet is freezing when using ModbusMaster. The same code works well when testing in on the Swan (switched the platformIO board/env). It looks like there’s a line of code in ModbusMas… --- ## [Notecard with Starnote stops transmitting over NTN suddenly, and resumes on device restart](https://discuss.blues.com/t/notecard-with-starnote-stops-transmitting-over-ntn-suddenly-and-resumes-on-device-restart/3294)
**Author:** [@gwolff](https://discuss.blues.com/u/gwolff)\ **Replies:** 0\ **Last updated:** [September 22, 2025, 6:30pm UTC](https://discuss.blues.com/t/notecard-with-starnote-stops-transmitting-over-ntn-suddenly-and-resumes-on-device-restart/3294 "2025-09-22T18:30:04Z")
Description My device is in the field and when it first powers on it is able to send messages via NTN (satellite). I see the expected messages at their expected intervals. But after a while, it just stops transmitting … --- ## [Cygnet - Wake-up after shutdown](https://discuss.blues.com/t/cygnet-wake-up-after-shutdown/3158)
**Author:** [@Marios122](https://discuss.blues.com/u/Marios122)\ **Replies:** 9\ **Last updated:** [August 20, 2025, 9:23am UTC](https://discuss.blues.com/t/cygnet-wake-up-after-shutdown/3158 "2025-08-20T09:23:56Z")
Hello, I am using my cygnet with notecarrief F v1.3 and notecard cell+wifi. I am trying to put it in shutdown mode so that every time it wakes up, setup() runs again. If I only use Lowpower.shutdown(10) and its connecte… --- ## [CircuitPython vs. Micropython](https://discuss.blues.com/t/circuitpython-vs-micropython/3113)
**Author:** [@scavoj](https://discuss.blues.com/u/scavoj)\ **Replies:** 2\ **Last updated:** [June 20, 2025, 1:36am UTC](https://discuss.blues.com/t/circuitpython-vs-micropython/3113 "2025-06-20T01:36:09Z")
I see a lot of documentation on using CircuitPython with a Swan but haven’t found any for Micropython. Will some of the Micropython functionality just not work with a Swan? Thanks, Joe --- ## [Firmware Update issues](https://discuss.blues.com/t/firmware-update-issues/3102)
**Author:** [@visariakeval](https://discuss.blues.com/u/visariakeval)\ **Replies:** 6\ **Last updated:** [June 17, 2025, 11:06pm UTC](https://discuss.blues.com/t/firmware-update-issues/3102 "2025-06-17T23:06:22Z")
Hey So my device has a bunch of sensors giving me sensor data. It is working on Solar so its up and running. But I wanted to update my JSON to get additional data like Timestamp, Latitude, longitude. I updated my code a… --- ## [STLink-V3 Mini Programmer not recognizing Sparrow Reference Node](https://discuss.blues.com/t/stlink-v3-mini-programmer-not-recognizing-sparrow-reference-node/1215)
**Author:** [@jgeckard](https://discuss.blues.com/u/jgeckard)\ **Replies:** 9\ **Last updated:** [April 5, 2025, 2:23am UTC](https://discuss.blues.com/t/stlink-v3-mini-programmer-not-recognizing-sparrow-reference-node/1215 "2025-04-05T02:23:55Z")
Trying to connect the STLink programmer/debugger to the sparrow reference node board but the programmer fails to connect. The fail file says, “The interface firmware FAILED to reset/halt the target MCU.” I have been able… --- ## [Best Approach for Remote Restart & Power Efficiency in Notecard Setup](https://discuss.blues.com/t/best-approach-for-remote-restart-power-efficiency-in-notecard-setup/2898)
**Author:** [@Leugim](https://discuss.blues.com/u/Leugim)\ **Replies:** 4\ **Last updated:** [March 4, 2025, 4:13pm UTC](https://discuss.blues.com/t/best-approach-for-remote-restart-power-efficiency-in-notecard-setup/2898 "2025-03-04T16:13:33Z")
Hello everyone, I’m looking for the best way to implement a remote restart option in my setup in case everything else fails. Since my system will be installed remotely, I need a reliable method to trigger a restart with… --- ## [Issue with NoteDeleteResponse when submitting requests from FreeRTOS thread](https://discuss.blues.com/t/issue-with-notedeleteresponse-when-submitting-requests-from-freertos-thread/2855)
**Author:** [@darkerenergy](https://discuss.blues.com/u/darkerenergy)\ **Replies:** 11\ **Last updated:** [March 3, 2025, 11:07am UTC](https://discuss.blues.com/t/issue-with-notedeleteresponse-when-submitting-requests-from-freertos-thread/2855 "2025-03-03T11:07:36Z")
Hi - I’m working on an app communicating with a Notecard, using FreeRTOS (on an STM Nucleo-U083RC). When I submit requests to the Notecard from a FreeRTOS thread, and then send the response to the terminal, everything s… --- ## [Notecard Outboard DFU support for large (\>1.5MB) binaries](https://discuss.blues.com/t/notecard-outboard-dfu-support-for-large-1-5mb-binaries/2795)
**Author:** [@devElert](https://discuss.blues.com/u/devElert)\ **Replies:** 3\ **Last updated:** [February 11, 2025, 6:42pm UTC](https://discuss.blues.com/t/notecard-outboard-dfu-support-for-large-1-5mb-binaries/2795 "2025-02-11T18:42:14Z")
Our project uses an ESP32-S3 with 16MB flash. At present, the firmware fits within the 1.5MB outboard DFU limit, so this is not an immediate concern. Thinking ahead, the host firmware may expand beyond that limit - the … --- ## [SWAN FlexPowerControl support?](https://discuss.blues.com/t/swan-flexpowercontrol-support/1002)
**Author:** [@JimM](https://discuss.blues.com/u/JimM)\ **Replies:** 14\ **Last updated:** [February 11, 2025, 5:16pm UTC](https://discuss.blues.com/t/swan-flexpowercontrol-support/1002 "2025-02-11T17:16:02Z")
I’m looking for examples or guidance on programming lower power (i.e. STOP mode) modes for the SWAN, to be awakened by external event interrupts or internal timer. Ideally with C++ on VS Code/PlatformIO programming envi… --- ## [Is there a timeout for note data retention inside the NoteCard?](https://discuss.blues.com/t/is-there-a-timeout-for-note-data-retention-inside-the-notecard/2803)
**Author:** [@jwsong](https://discuss.blues.com/u/jwsong)\ **Replies:** 2\ **Last updated:** [February 4, 2025, 7:18pm UTC](https://discuss.blues.com/t/is-there-a-timeout-for-note-data-retention-inside-the-notecard/2803 "2025-02-04T19:18:55Z")
I have a question about NoteCard notes data retention. If the host CPU issues a note while the NoteCard is not connected to an LTE tower, it will be stored in the internal flash memory, correct? If so, will it remain i… --- ## [Received notes getting corrupted](https://discuss.blues.com/t/received-notes-getting-corrupted/2576)
**Author:** [@rlkeith](https://discuss.blues.com/u/rlkeith)\ **Replies:** 16\ **Last updated:** [January 13, 2025, 1:41pm UTC](https://discuss.blues.com/t/received-notes-getting-corrupted/2576 "2025-01-13T13:41:17Z")
Hi All, I am moving my Arduino-like project to use Zephyr and C. It is mostly working but something wrong with the deserialization functions. The notecard message is as expected: \[INFO\] {“req”:“note.get”,“file”:“comm… --- ## [Enable GPIO Interrupt for host firmware update](https://discuss.blues.com/t/enable-gpio-interrupt-for-host-firmware-update/2461)
**Author:** [@Thareeq](https://discuss.blues.com/u/Thareeq)\ **Replies:** 1\ **Last updated:** [November 25, 2024, 6:31pm UTC](https://discuss.blues.com/t/enable-gpio-interrupt-for-host-firmware-update/2461 "2024-11-25T18:31:26Z")
Hi, I am trying to get an GPIO interrupt on my host device when a new host firmware is updated in the notehub. I cannot find such a configuration neither in ATTN pins nor in AUX pins. I found something similar for outboa… --- ## [Collecting Sensor Data (tutorial)](https://discuss.blues.com/t/collecting-sensor-data-tutorial/2404)
**Author:** [@Andres18](https://discuss.blues.com/u/Andres18)\ **Replies:** 6\ **Last updated:** [November 13, 2024, 9:32pm UTC](https://discuss.blues.com/t/collecting-sensor-data-tutorial/2404 "2024-11-13T21:32:58Z")
On this Step: If you’re using PlatformIO, open the Serial Monitor by clicking the plug icon in the bottom of VS Code. You should see a few debug messages, including the JSON object you sent, as well as the response fro… --- ## [Updating firmware on Lora card](https://discuss.blues.com/t/updating-firmware-on-lora-card/2411)
**Author:** [@iseries1](https://discuss.blues.com/u/iseries1)\ **Replies:** 6\ **Last updated:** [October 30, 2024, 3:49pm UTC](https://discuss.blues.com/t/updating-firmware-on-lora-card/2411 "2024-10-30T15:49:39Z")
Trying to update to version notecard-wl-7.4.2.16888 from notecard-wl-7.2.2.16518. It states that I have to use manual method with programmer. When I enter the bootloader command nothing happens, and the unit is unrespon… --- ## [Advice for battery powered water level sensor](https://discuss.blues.com/t/advice-for-battery-powered-water-level-sensor/2341)
**Author:** [@iarakis](https://discuss.blues.com/u/iarakis)\ **Replies:** 12\ **Last updated:** [October 29, 2024, 6:42am UTC](https://discuss.blues.com/t/advice-for-battery-powered-water-level-sensor/2341 "2024-10-29T06:42:29Z")
Hi, I would like to ask for advice about the implementation of code for my application. I have an ESP32 mcu with Arduino, a Notecarrier and Notecard and a ultrasonic level sensor (A02YYUW Waterproof Ultrasonic Distance … --- ## [Firmware upgrade bug from 5.1.1.16026 to 6.2.5.16868 with Notecarrier A](https://discuss.blues.com/t/firmware-upgrade-bug-from-5-1-1-16026-to-6-2-5-16868-with-notecarrier-a/2305)
**Author:** [@johnedstone](https://discuss.blues.com/u/johnedstone)\ **Replies:** 4\ **Last updated:** [October 25, 2024, 10:32pm UTC](https://discuss.blues.com/t/firmware-upgrade-bug-from-5-1-1-16026-to-6-2-5-16868-with-notecarrier-a/2305 "2024-10-25T22:32:30Z")
I’m documenting either a bug, or perhaps this is in the documentation, which I haven’t found yet. I upgraded the firmware on a Notecarrier A (with Notecard NOTE-WBNA-500) using OTA DFU with Notehub protocal The firmwar… --- ## [Is it possible to update Host firmware through Notecard cellular AS A TIME BOUND EVENT](https://discuss.blues.com/t/is-it-possible-to-update-host-firmware-through-notecard-cellular-as-a-time-bound-event/2370)
**Author:** [@Raju](https://discuss.blues.com/u/Raju)\ **Replies:** 2\ **Last updated:** [October 21, 2024, 11:53pm UTC](https://discuss.blues.com/t/is-it-possible-to-update-host-firmware-through-notecard-cellular-as-a-time-bound-event/2370 "2024-10-21T23:53:59Z")
Hi, I have a Notecard Cell+Wifi (NOTE-NBNA) running firmware 7.4.2.16888 on a Carrier A. I wanted to update Host firmware, Is there a way to Sync and download host image soon after requested on Notehub? I am using dfu-… [Next page](https://discuss.blues.com/c/firmware/13.md?page=1)