# Latest **URL:** https://forum.jumperless.org/latest.md [Latest](https://forum.jumperless.org/latest.md) · [Categories](https://forum.jumperless.org/categories.md) · [Tags](https://forum.jumperless.org/tags.md) --- ## [Link to the build docs](https://forum.jumperless.org/t/link-to-the-build-docs/20)
**Author:** [@JamesNewton](https://forum.jumperless.org/u/JamesNewton)\ **Replies:** 1\ **Last updated:** [November 15, 2023, 8:13pm UTC](https://forum.jumperless.org/t/link-to-the-build-docs/20 "2023-11-15T20:13:41Z")
Might be worth pinning? --- ## [Welcome to Jumperless Forum! 👋](https://forum.jumperless.org/t/welcome-to-jumperless-forum/5)
**Author:** [@system](https://forum.jumperless.org/u/system)\ **Replies:** 4\ **Last updated:** [November 15, 2023, 10:41pm UTC](https://forum.jumperless.org/t/welcome-to-jumperless-forum/5 "2023-11-15T22:41:20Z")
We are so glad you joined us. Jumperless Forum A forum for sharing hacks and help related to the Jumperless breadboard Here are some things you can do to get started: :speaking\_head: Introduce yourself by adding you… --- ## [Newbe help with app command to set rail power on V5](https://forum.jumperless.org/t/newbe-help-with-app-command-to-set-rail-power-on-v5/145)
**Author:** [@roybh](https://forum.jumperless.org/u/roybh)\ **Replies:** 3\ **Last updated:** [January 16, 2026, 6:06pm UTC](https://forum.jumperless.org/t/newbe-help-with-app-command-to-set-rail-power-on-v5/145 "2026-01-16T18:06:29Z")
Using the app CLI setting nets works ok but setting the voltage on the rails is a mystery to me. Tried TOP\_RAIL\>6.5V as well as setTopRail((float)5.1). net list always report 0 volts. Also checked with a volt meter betw… --- ## [A little bit about me](https://forum.jumperless.org/t/a-little-bit-about-me/143)
**Author:** [@Romonaga](https://forum.jumperless.org/u/Romonaga)\ **Replies:** 0\ **Last updated:** [August 26, 2025, 2:16pm UTC](https://forum.jumperless.org/t/a-little-bit-about-me/143 "2025-08-26T14:16:21Z")
Hello, I’m 62 years young and have been in software development for over 40 years. I got my start on a Commodore 64 and have since programmed across a wide spectrum of platforms—from the S/36 and AS/400 to modern Windows… --- ## [Road to Version 5](https://forum.jumperless.org/t/road-to-version-5/137)
**Author:** [@nealzip](https://forum.jumperless.org/u/nealzip)\ **Replies:** 3\ **Last updated:** [April 12, 2025, 1:12am UTC](https://forum.jumperless.org/t/road-to-version-5/137 "2025-04-12T01:12:01Z")
Sitting on my hands waiting for my Jumperless to be shipped. On May 1st I’ll be asking the Mailman if the package is lost ;). --- ## [Using a NEO-6M or NEO-M8N GPS Module with Jumperrless](https://forum.jumperless.org/t/using-a-neo-6m-or-neo-m8n-gps-module-with-jumperrless/134)
**Author:** [@crash267](https://forum.jumperless.org/u/crash267)\ **Replies:** 5\ **Last updated:** [January 4, 2025, 5:25am UTC](https://forum.jumperless.org/t/using-a-neo-6m-or-neo-m8n-gps-module-with-jumperrless/134 "2025-01-04T05:25:07Z")
I am trying to use a NEO-M8N GPS module with the Jumperless breadboard. I chose two rows for power and ground and verified that there is 5v present using an oscilloscope. But when the GPS module is added, the 5v drops to… --- ## [Can jumperless function as an audio matrix switch](https://forum.jumperless.org/t/can-jumperless-function-as-an-audio-matrix-switch/122)
**Author:** [@dstengle](https://forum.jumperless.org/u/dstengle)\ **Replies:** 9\ **Last updated:** [December 13, 2024, 8:01pm UTC](https://forum.jumperless.org/t/can-jumperless-function-as-an-audio-matrix-switch/122 "2024-12-13T20:01:32Z")
The way I’m looking at it, jumperless could function as a 128x128 audio switch. Is this likely to work? I don’t know if there might be any bleed or noise issues with this kind of use. My idea is to use headers to connec… --- ## [Spring Clip Update](https://forum.jumperless.org/t/spring-clip-update/48)
**Author:** [@ArchiteuthisFlux](https://forum.jumperless.org/u/ArchiteuthisFlux)\ **Replies:** 8\ **Last updated:** [December 9, 2024, 6:55am UTC](https://forum.jumperless.org/t/spring-clip-update/48 "2024-12-09T06:55:26Z")
So, you’ve probably noticed that sticking things into the Jumperless’s breadboard contacts isn’t quite as easy or smooth as regular breadboards. Here’s why: I was being to cautious with my original design, I was worr… --- ## [3D Printable Case](https://forum.jumperless.org/t/3d-printable-case/125)
**Author:** [@shallax](https://forum.jumperless.org/u/shallax)\ **Replies:** 1\ **Last updated:** [October 25, 2024, 4:30pm UTC](https://forum.jumperless.org/t/3d-printable-case/125 "2024-10-25T16:30:46Z")
Nice tools deserve cases to keep them safe when not in use, so here’s one I made. I hope you find it useful: Jumperless v1-3 Case by shallax | Download free STL model | Printables.com --- ## ["Bare bones" version for classroom use?](https://forum.jumperless.org/t/bare-bones-version-for-classroom-use/115)
**Author:** [@mcpublic](https://forum.jumperless.org/u/mcpublic)\ **Replies:** 8\ **Last updated:** [October 8, 2024, 7:15pm UTC](https://forum.jumperless.org/t/bare-bones-version-for-classroom-use/115 "2024-10-08T19:15:09Z")
\[I’m a SWE/EE with a UI/UX background and a masters in educational technology from MIT\] The newest Jumperless v5 looks great! I particularly like that it can work without a computer attached. Have you considered a sing… --- ## [Controlling RP2040 over UART](https://forum.jumperless.org/t/controlling-rp2040-over-uart/108)
**Author:** [@jmw](https://forum.jumperless.org/u/jmw)\ **Replies:** 6\ **Last updated:** [September 15, 2024, 7:14pm UTC](https://forum.jumperless.org/t/controlling-rp2040-over-uart/108 "2024-09-15T19:14:42Z")
I was trying to follow along with this demo: Now the Arduino can send connections to the Jumperless over UART but nothing was working … upon investigation, it seems Rev 3 does not tie the D0+D1 UART to the RP2040 via ju… --- ## [Basic how-to for using probe?](https://forum.jumperless.org/t/basic-how-to-for-using-probe/105)
**Author:** [@SteveE52](https://forum.jumperless.org/u/SteveE52)\ **Replies:** 2\ **Last updated:** [July 17, 2024, 5:04pm UTC](https://forum.jumperless.org/t/basic-how-to-for-using-probe/105 "2024-07-17T17:04:23Z")
I have built the probe that came with my Jumperless - seems to work OK, but I would like to know if there’s a quick how-to for using it efficiently. Thanks… --- ## [Need help getting out of the starting gate with my Nano](https://forum.jumperless.org/t/need-help-getting-out-of-the-starting-gate-with-my-nano/103)
**Author:** [@SteveE52](https://forum.jumperless.org/u/SteveE52)\ **Replies:** 18\ **Last updated:** [July 16, 2024, 3:45am UTC](https://forum.jumperless.org/t/need-help-getting-out-of-the-starting-gate-with-my-nano/103 "2024-07-16T03:45:18Z")
I’m reasonably comfortable with the Arduino IDE, and can build regular breadboard circuitry. I’m just starting out with the Jumperless (I LOVE the idea!), and have quickly realized I’m out of my depth. Just to experime… --- ## [New Jumperless user - old guy, but enthusiastic](https://forum.jumperless.org/t/new-jumperless-user-old-guy-but-enthusiastic/104)
**Author:** [@SteveE52](https://forum.jumperless.org/u/SteveE52)\ **Replies:** 6\ **Last updated:** [July 15, 2024, 4:54am UTC](https://forum.jumperless.org/t/new-jumperless-user-old-guy-but-enthusiastic/104 "2024-07-15T04:54:26Z")
I’m a retired industrial control system engineer, playing around with IoT stuff in my home & elsewhere to keep myself out of my wife’s hair. 72 years old, lots of spare time & enthusiasm but possibly a bit “old school”.… --- ## [Nodes not always connecting](https://forum.jumperless.org/t/nodes-not-always-connecting/78)
**Author:** [@someguy](https://forum.jumperless.org/u/someguy)\ **Replies:** 14\ **Last updated:** [June 26, 2024, 9:47pm UTC](https://forum.jumperless.org/t/nodes-not-always-connecting/78 "2024-06-26T21:47:59Z")
First: Big thanks for the Jumperless, what a great project! I may be doing something wrong here, but using pyserial to make vertical connections from pin 1 to 31, 2 to 32 … etc (on a Jumperless with firmware v1.1.1.1.5 … --- ## [Setup of Arduino Nano ESP32](https://forum.jumperless.org/t/setup-of-arduino-nano-esp32/98)
**Author:** [@fpetzold](https://forum.jumperless.org/u/fpetzold)\ **Replies:** 9\ **Last updated:** [June 19, 2024, 6:55am UTC](https://forum.jumperless.org/t/setup-of-arduino-nano-esp32/98 "2024-06-19T06:55:14Z")
Hi all. I just got my Jumperless and because I am coming from the ESP8266/ESP32 MicroPython world, I got an Arduino Nano ESP32 to plug it in. Now, before I go into deep research of the board, has someone already setup an… --- ## [Firmware Development Roadmap](https://forum.jumperless.org/t/firmware-development-roadmap/53)
**Author:** [@ArchiteuthisFlux](https://forum.jumperless.org/u/ArchiteuthisFlux)\ **Replies:** 4\ **Last updated:** [June 12, 2024, 3:49pm UTC](https://forum.jumperless.org/t/firmware-development-roadmap/53 "2024-06-12T15:49:20Z")
Okay, so I want to put up the order in which I’m working on things so I can get some feedback about which features are most important to you and what this order should be. This order is pretty loose because my working s… --- ## [Having a problem programming a nano with one usb cable](https://forum.jumperless.org/t/having-a-problem-programming-a-nano-with-one-usb-cable/68)
**Author:** [@jarclan](https://forum.jumperless.org/u/jarclan)\ **Replies:** 20\ **Last updated:** [March 19, 2024, 3:56pm UTC](https://forum.jumperless.org/t/having-a-problem-programming-a-nano-with-one-usb-cable/68 "2024-03-19T15:56:21Z")
I just got my jumperless a couple of days ago. On Windows 10, I have the usb cable plugged into the jumperless and get ports 10 and 12. The netlist from wokwi downloaded and looks good. I copied the sketch from wokwi a… --- ## [Mtnforman says hi](https://forum.jumperless.org/t/mtnforman-says-hi/92)
**Author:** [@mtnforman](https://forum.jumperless.org/u/mtnforman)\ **Replies:** 0\ **Last updated:** [February 19, 2024, 8:36pm UTC](https://forum.jumperless.org/t/mtnforman-says-hi/92 "2024-02-19T20:36:29Z")
Hello everyone! purchased 2x boards and look forward to simplifying the prototyping process. Im an electrical engineer working in the medical device field and currently using the jumperless board to evaluate some I2C lig… --- ## [Basic Serial COM](https://forum.jumperless.org/t/basic-serial-com/91)
**Author:** [@mtnforman](https://forum.jumperless.org/u/mtnforman)\ **Replies:** 0\ **Last updated:** [February 19, 2024, 8:23pm UTC](https://forum.jumperless.org/t/basic-serial-com/91 "2024-02-19T20:23:37Z")
Starting this topic here to catalog lessons learned and perhaps some how-to information focused specifically on serial communication with the jumperless board. --- ## [Someone Let the Electric Pixies Out](https://forum.jumperless.org/t/someone-let-the-electric-pixies-out/89)
**Author:** [@mtnforman](https://forum.jumperless.org/u/mtnforman)\ **Replies:** 3\ **Last updated:** [February 15, 2024, 1:34am UTC](https://forum.jumperless.org/t/someone-let-the-electric-pixies-out/89 "2024-02-15T01:34:58Z")
Today, while in the lab, managed to do some damage to my jumperless and was hoping someone may have some thoughts as what i should look at reworking first: Failure mode is the following: Position 25 of the jumper board… --- ## [Serial connection not working](https://forum.jumperless.org/t/serial-connection-not-working/88)
**Author:** [@ichurch](https://forum.jumperless.org/u/ichurch)\ **Replies:** 3\ **Last updated:** [February 11, 2024, 4:58pm UTC](https://forum.jumperless.org/t/serial-connection-not-working/88 "2024-02-11T16:58:15Z")
Hi, I got my factory built jumperless last week. I’ve been trying to get it up and running since receiving it. I’m using a Windows 11 PC. What I see is: It powers on sucessfully, and displays the same LEDs as I see in… --- ## [Cannot wait to Jumper less](https://forum.jumperless.org/t/cannot-wait-to-jumper-less/86)
**Author:** [@loydmilligan](https://forum.jumperless.org/u/loydmilligan)\ **Replies:** 2\ **Last updated:** [February 10, 2024, 12:18am UTC](https://forum.jumperless.org/t/cannot-wait-to-jumper-less/86 "2024-02-10T00:18:49Z")
Got it yesterday in the mail - very fast shipping - appreciated the old school label maker label. I did not have time to mess with it yet - excited to do so…hopefully this weekend. I am an electronics hobbyist focusi… --- ## [Pro Nano Choice?](https://forum.jumperless.org/t/pro-nano-choice/87)
**Author:** [@loydmilligan](https://forum.jumperless.org/u/loydmilligan)\ **Replies:** 1\ **Last updated:** [February 9, 2024, 5:03pm UTC](https://forum.jumperless.org/t/pro-nano-choice/87 "2024-02-09T17:03:31Z")
I am not complaining - I am curious why the nano was chosen for the header at the top. Hopefully this question is not easily answered with a cursory glance at the docs. Anyway, I realized shortly after receiving JL that… --- ## [Can't flash/run nano RP2040 connect while on board](https://forum.jumperless.org/t/cant-flash-run-nano-rp2040-connect-while-on-board/81)
**Author:** [@diegoasanch](https://forum.jumperless.org/u/diegoasanch)\ **Replies:** 5\ **Last updated:** [January 22, 2024, 7:11pm UTC](https://forum.jumperless.org/t/cant-flash-run-nano-rp2040-connect-while-on-board/81 "2024-01-22T19:11:22Z")
I just got my Jumperless today!!! I’ve been trying to get it working with an arduino nano RP2040 connect but I am not being able to flash the nano while it’s mounted to the jumperless. Ports I noticed that the jumperles… --- ## [UI Idea: control the jumperless from a webcam feed](https://forum.jumperless.org/t/ui-idea-control-the-jumperless-from-a-webcam-feed/71)
**Author:** [@nilclass](https://forum.jumperless.org/u/nilclass)\ **Replies:** 6\ **Last updated:** [December 26, 2023, 6:21pm UTC](https://forum.jumperless.org/t/ui-idea-control-the-jumperless-from-a-webcam-feed/71 "2023-12-26T18:21:57Z")
The wokwi bridge is great and all, and typing bridge connections manually is certainly fun as well. But I believe better things are possible! So, I’m thinking about what a jumperless specific UI could look like. This … --- ## [Jlctl: a command line tool for controlling your Jumperless - by Niklas Cathor](https://forum.jumperless.org/t/jlctl-a-command-line-tool-for-controlling-your-jumperless-by-niklas-cathor/73)
**Author:** [@ArchiteuthisFlux](https://forum.jumperless.org/u/ArchiteuthisFlux)\ **Replies:** 0\ **Last updated:** [December 26, 2023, 4:56am UTC](https://forum.jumperless.org/t/jlctl-a-command-line-tool-for-controlling-your-jumperless-by-niklas-cathor/73 "2023-12-26T04:56:24Z")
Hey guys, I just wanted to show you this awesome command line tool that @nilclass is working on. It already works well at a basic level, so I encourage you all to try it out, break stuff, fix stuff, cheer him on, what… --- ## [Getting Started using your Jumperless](https://forum.jumperless.org/t/getting-started-using-your-jumperless/34)
**Author:** [@ArchiteuthisFlux](https://forum.jumperless.org/u/ArchiteuthisFlux)\ **Replies:** 4\ **Last updated:** [December 22, 2023, 8:17pm UTC](https://forum.jumperless.org/t/getting-started-using-your-jumperless/34 "2023-12-22T20:17:40Z")
Please let me know if you followed these steps and I missed something in the instructions. I’m also especially interested in how the Wokwi Bridge App works in Windows. --- ## [3D Printed Stand](https://forum.jumperless.org/t/3d-printed-stand/57)
**Author:** [@swb1701](https://forum.jumperless.org/u/swb1701)\ **Replies:** 3\ **Last updated:** [December 21, 2023, 11:48am UTC](https://forum.jumperless.org/t/3d-printed-stand/57 "2023-12-21T11:48:35Z")
I made a 3d-printed stand to hold the board. If you’re interested, I posted it at: https://www.printables.com/model/684090-stand-for-the-jumperless-breadboard --- ## [Now the Arduino can send connections to the Jumperless over UART](https://forum.jumperless.org/t/now-the-arduino-can-send-connections-to-the-jumperless-over-uart/58)
**Author:** [@ArchiteuthisFlux](https://forum.jumperless.org/u/ArchiteuthisFlux)\ **Replies:** 1\ **Last updated:** [December 17, 2023, 9:37pm UTC](https://forum.jumperless.org/t/now-the-arduino-can-send-connections-to-the-jumperless-over-uart/58 "2023-12-17T21:37:30Z")
First of all, Guy Dupont is an absolute rockstar. The same day he got his Jumperless, he started writing a CircuitPython library to have a microcontroller send a list of connections to the Jumperless over the UART lines.… [Next page](https://forum.jumperless.org/latest.md?page=1)