# Latest **URL:** https://forum.arduino.cc/latest.md [Latest](https://forum.arduino.cc/latest.md) · [Categories](https://forum.arduino.cc/categories.md) --- ## [IDE no longer shows sketch code](https://forum.arduino.cc/t/ide-no-longer-shows-sketch-code/1461630)
**Author:** [@feerdableusmoek](https://forum.arduino.cc/u/feerdableusmoek)\ **Replies:** 15\ **Last updated:** [September 30, 2026, 10:37pm UTC](https://forum.arduino.cc/t/ide-no-longer-shows-sketch-code/1461630 "2026-09-30T22:37:32Z")
The IDE no longer renders any code in my sketches. I can see the structure (grey vertical lines) of each sketch but not the text any more. Same for the accompanying files in the sketch. The files the .ino file's conte… --- ## [Force to always print the same number of digits for floats](https://forum.arduino.cc/t/force-to-always-print-the-same-number-of-digits-for-floats/1461547)
**Author:** [@bart-fr](https://forum.arduino.cc/u/bart-fr)\ **Replies:** 36\ **Last updated:** [September 30, 2026, 10:19pm UTC](https://forum.arduino.cc/t/force-to-always-print-the-same-number-of-digits-for-floats/1461547 "2026-09-30T22:19:07Z")
Hello, I am looking for an elegant way to always print the same number of digits of a float for display purposes. For example, I want to print 5 digits of the incoming floats, so if the incoming float is 1.23654, I want… --- ## [Output for a Decimal to Hexadecimal Project Displays 4 bars ! Please help](https://forum.arduino.cc/t/output-for-a-decimal-to-hexadecimal-project-displays-4-bars-please-help/1461355)
**Author:** [@jarbaga](https://forum.arduino.cc/u/jarbaga)\ **Replies:** 5\ **Last updated:** [September 30, 2026, 10:15pm UTC](https://forum.arduino.cc/t/output-for-a-decimal-to-hexadecimal-project-displays-4-bars-please-help/1461355 "2026-09-30T22:15:49Z")
\#include \ LiquidCrystal\_I2C lcd(0x27, 16, 2); int decimal = 4500; int hexVal = 0; int hexR = 0; int hexValPrev = 0; char hexOut\[16\]; int i = 0; void setup() { lcd.init(); lcd.backlight(); lcd… --- ## [Compiler handling of an expression with XOR functions](https://forum.arduino.cc/t/compiler-handling-of-an-expression-with-xor-functions/1461444)
**Author:** [@harryapple](https://forum.arduino.cc/u/harryapple)\ **Replies:** 15\ **Last updated:** [September 30, 2026, 9:51pm UTC](https://forum.arduino.cc/t/compiler-handling-of-an-expression-with-xor-functions/1461444 "2026-09-30T21:51:34Z")
I think the two expressions if (A ^ B ^ C ^ D == 0) {...} if ((A ^ B ^ C ^ D) == 0) {...} Should deliver equal results. But in my program, when debugging, I found out I had to use the second one to make it work. Stra… --- ## [Lighthouse weather station update](https://forum.arduino.cc/t/lighthouse-weather-station-update/1461374)
**Author:** [@marine\_hm\_again](https://forum.arduino.cc/u/marine_hm_again)\ **Replies:** 19\ **Last updated:** [September 30, 2026, 9:03pm UTC](https://forum.arduino.cc/t/lighthouse-weather-station-update/1461374 "2026-09-30T21:03:03Z")
Just an update on the progress of my Lighthouse/Mailbox/Weather Station. Unfortunately, I'm not able to get on here as much as I like since taking care of my elderly mother full time. But I have completed the sketch p… --- ## [How to use Arduino with ZK-5KX dc-dc buck boost converter](https://forum.arduino.cc/t/how-to-use-arduino-with-zk-5kx-dc-dc-buck-boost-converter/1461545)
**Author:** [@idlisambar](https://forum.arduino.cc/u/idlisambar)\ **Replies:** 6\ **Last updated:** [September 30, 2026, 8:52pm UTC](https://forum.arduino.cc/t/how-to-use-arduino-with-zk-5kx-dc-dc-buck-boost-converter/1461545 "2026-09-30T20:52:52Z")
SO I have this Zk -5KX dc dc buck boost convertor and I want to configure it via Arduino. I have a Arduino UNO. Now I also want to set parameter, Swtich off and ON the buck boost via arduino. Up until now I am successful… --- ## [Uploading failures with ICSP](https://forum.arduino.cc/t/uploading-failures-with-icsp/1461649)
**Author:** [@ARDTECH](https://forum.arduino.cc/u/ARDTECH)\ **Replies:** 2\ **Last updated:** [September 30, 2026, 8:41pm UTC](https://forum.arduino.cc/t/uploading-failures-with-icsp/1461649 "2026-09-30T20:41:43Z")
I am using Arduino IDE 2.3.10 with Windows 11. I set up a breadboard for programming a new ATMega328P CPU using an Arduino Uno as an ICSP programmer. I uploaded the Blink.ino sketch and ran it successfully. However, a s… --- ## [ESP32 OTA only once after reset](https://forum.arduino.cc/t/esp32-ota-only-once-after-reset/1460920)
**Author:** [@nikwing2](https://forum.arduino.cc/u/nikwing2)\ **Replies:** 11\ **Last updated:** [September 30, 2026, 6:33pm UTC](https://forum.arduino.cc/t/esp32-ota-only-once-after-reset/1460920 "2026-09-30T18:33:38Z")
Hello all :slight\_smile: My old account disappeared again, so I had to create this new one. How fast are accounts deactivated/deleted after inactivity? I don't want to write ping messages just to stay alive here … --- ## [Ubuntu updates on VENTUNO Q](https://forum.arduino.cc/t/ubuntu-updates-on-ventuno-q/1461632)
**Author:** [@andypiper](https://forum.arduino.cc/u/andypiper)\ **Replies:** 2\ **Last updated:** [September 30, 2026, 6:08pm UTC](https://forum.arduino.cc/t/ubuntu-updates-on-ventuno-q/1461632 "2026-09-30T18:08:50Z")
Ubuntu is prompting me / suggesting do-release-upgrade to 26.04.1 LTS when I ssh in. Is that going to work - will the Arduino packages and Qualcomm customisations work on 26.04.1? I assume that the board ships with 24.… --- ## [Arduino Uno Q Rover with Obstacle Avoidance](https://forum.arduino.cc/t/arduino-uno-q-rover-with-obstacle-avoidance/1461588)
**Author:** [@Merlin513](https://forum.arduino.cc/u/Merlin513)\ **Replies:** 2\ **Last updated:** [September 30, 2026, 5:36pm UTC](https://forum.arduino.cc/t/arduino-uno-q-rover-with-obstacle-avoidance/1461588 "2026-09-30T17:36:50Z")
Been working on a new project using the Arduino Uno Q. Decided to use the Q as a controller and a obstacle avoidance rover using a BNO055, a VL53L5CX TOF 8x8 distance sensor and a Adafruit Motor Controller attached to … --- ## [Troubleshoting ZK-4KX V3 It displays incorrect information](https://forum.arduino.cc/t/troubleshoting-zk-4kx-v3-it-displays-incorrect-information/1459489)
**Author:** [@pejman1977](https://forum.arduino.cc/u/pejman1977)\ **Replies:** 3\ **Last updated:** [September 30, 2026, 5:09pm UTC](https://forum.arduino.cc/t/troubleshoting-zk-4kx-v3-it-displays-incorrect-information/1459489 "2026-09-30T17:09:03Z")
I have a buck-boost module of this exact model. For the past few days, all the displayed readings have been incorrect. It shows higher-than-actual values ​​for both input and output voltages, even when adjustments are … --- ## [Serial port not found](https://forum.arduino.cc/t/serial-port-not-found/1460953)
**Author:** [@bewat](https://forum.arduino.cc/u/bewat)\ **Replies:** 28\ **Last updated:** [September 30, 2026, 5:05pm UTC](https://forum.arduino.cc/t/serial-port-not-found/1460953 "2026-09-30T17:05:51Z")
Just starting here. "Getting Started with Arduino" book says I will find Serial Port in Tools menu and to "select the port that begins with /dev/cu.usbmodem OR /dev/tty.usbmodem. Neither are listed in my Serial Ports. … --- ## [Arduino Uno Q USB camera not working](https://forum.arduino.cc/t/arduino-uno-q-usb-camera-not-working/1461603)
**Author:** [@ujjwalrathod007](https://forum.arduino.cc/u/ujjwalrathod007)\ **Replies:** 2\ **Last updated:** [September 30, 2026, 4:46pm UTC](https://forum.arduino.cc/t/arduino-uno-q-usb-camera-not-working/1461603 "2026-09-30T16:46:23Z")
I have been following some guide on how to activate host mode on Arduino Uno Q to detect a USB camera module and could not get the camera module powered and detected. I am using the Vin pin, and I also tried the 5V pin … --- ## [How to design 3:1 pulley/belt system for a UGV](https://forum.arduino.cc/t/how-to-design-3-1-pulley-belt-system-for-a-ugv/1460219)
**Author:** [@wolfrose](https://forum.arduino.cc/u/wolfrose)\ **Replies:** 97\ **Last updated:** [September 30, 2026, 4:42pm UTC](https://forum.arduino.cc/t/how-to-design-3-1-pulley-belt-system-for-a-ugv/1460219 "2026-09-30T16:42:55Z")
Hi, I want to build the exact robot like this one: I bought most of the electronics: Motor: 12V 960rpm motors Wheels: 100mm wheels ESCs: 2x 5A Dual Way Bidirectional Brushed ESC Controller: Arduino nano Battery: 6… --- ## [APP can recognize UNO Q,but I can't connect it with APP LAB](https://forum.arduino.cc/t/app-can-recognize-uno-q-but-i-cant-connect-it-with-app-lab/1461569)
**Author:** [@misswait](https://forum.arduino.cc/u/misswait)\ **Replies:** 21\ **Last updated:** [September 30, 2026, 4:27pm UTC](https://forum.arduino.cc/t/app-can-recognize-uno-q-but-i-cant-connect-it-with-app-lab/1461569 "2026-09-30T16:27:41Z")
The APP can recognize UNO Q, but I am unable to connect it with APP LAB. The Arduino APP LAB can display my UNO Q, but when clicked, it shows "loading" without any response. My computer is running Windows 11 version 25… --- ## [Meters for Ham Radio DC Distribution Rack](https://forum.arduino.cc/t/meters-for-ham-radio-dc-distribution-rack/1461572)
**Author:** [@w1sps](https://forum.arduino.cc/u/w1sps)\ **Replies:** 1\ **Last updated:** [September 30, 2026, 3:52pm UTC](https://forum.arduino.cc/t/meters-for-ham-radio-dc-distribution-rack/1461572 "2026-09-30T15:52:17Z")
In the process of building a DC Distribution rack for my ham radio tower. I wanted isolated switching of 16 fused outputs to various equipment. Such as, my main transceiver, chargers for portable transceivers, Antenna Tu… --- ## [JDY - 23 BLE Battery info](https://forum.arduino.cc/t/jdy-23-ble-battery-info/1461439)
**Author:** [@jakes79](https://forum.arduino.cc/u/jakes79)\ **Replies:** 6\ **Last updated:** [September 30, 2026, 2:07pm UTC](https://forum.arduino.cc/t/jdy-23-ble-battery-info/1461439 "2026-09-30T14:07:30Z")
Hi there, I have a project where I want to use a JDY -23 for BLE advertising. I see in teh documentation that there is a battery info (AT+BATT) that send the Battery percentage. I want to know, do I need to have another… --- ## [Play a Gif on M5 Stack StopWatch using BMP](https://forum.arduino.cc/t/play-a-gif-on-m5-stack-stopwatch-using-bmp/1461335)
**Author:** [@adthay](https://forum.arduino.cc/u/adthay)\ **Replies:** 17\ **Last updated:** [September 30, 2026, 2:01pm UTC](https://forum.arduino.cc/t/play-a-gif-on-m5-stack-stopwatch-using-bmp/1461335 "2026-09-30T14:01:41Z")
I am attempting to put together a simple Gif player on the M5 Stack StopWatch. As the StopWatch has no SD card slot this necessitates displaying from a BMP of the gif. I found and have been successful with Tommy Ho's M5G… --- ## [Replacing the fan & heatsink](https://forum.arduino.cc/t/replacing-the-fan-heatsink/1460916)
**Author:** [@onnoj](https://forum.arduino.cc/u/onnoj)\ **Replies:** 7\ **Last updated:** [September 30, 2026, 1:45pm UTC](https://forum.arduino.cc/t/replacing-the-fan-heatsink/1460916 "2026-09-30T13:45:21Z")
The fan (at least, mine) seems to generate a very high pitched noise. Has anyone had succes with or at least looked into replacing the fan with something quieter? I couldn't really find if the current fan/heatsink size … --- ## [Issues with Ventuno Q (m.2, tmp, App Lab)](https://forum.arduino.cc/t/issues-with-ventuno-q-m-2-tmp-app-lab/1460599)
**Author:** [@flynntheavatar](https://forum.arduino.cc/u/flynntheavatar)\ **Replies:** 5\ **Last updated:** [September 30, 2026, 1:18pm UTC](https://forum.arduino.cc/t/issues-with-ventuno-q-m-2-tmp-app-lab/1460599 "2026-09-30T13:18:14Z")
Hello, During usage of the Ventuno Q I observed the following issues. M.2 NVMe Support KingSpec M.2 NVMe 2330 PCIe Gen4 512 GB Not detected after a cold boot. Detected reliably after a warm reboot. f3 completed succes… --- ## [Trying to move two servos with mpu6050 imu](https://forum.arduino.cc/t/trying-to-move-two-servos-with-mpu6050-imu/1461482)
**Author:** [@drdreadful0](https://forum.arduino.cc/u/drdreadful0)\ **Replies:** 12\ **Last updated:** [September 30, 2026, 1:17pm UTC](https://forum.arduino.cc/t/trying-to-move-two-servos-with-mpu6050-imu/1461482 "2026-09-30T13:17:03Z")
Hello, I am working on a tvc rocket mount prototype and have been stuck on this problem for some time. I am new to using arduino ide, as well as creating circuits in general. The problem that I am experiencing is mainly … --- ## [Dead VENTUNO Q?](https://forum.arduino.cc/t/dead-ventuno-q/1460152)
**Author:** [@kd7eir](https://forum.arduino.cc/u/kd7eir)\ **Replies:** 19\ **Last updated:** [September 30, 2026, 1:07pm UTC](https://forum.arduino.cc/t/dead-ventuno-q/1460152 "2026-09-30T13:07:53Z")
Following this tutorial: https://docs.arduino.cc/tutorials/ventuno-q/first-setup/ App Lab doesn't detect the VENTUNO Q. I rebooted my computer and power-cycled the VENTUNO Q, but it still isn't detected. Tested the US… --- ## [Grounding or not Grounding an USB shield, that is the question](https://forum.arduino.cc/t/grounding-or-not-grounding-an-usb-shield-that-is-the-question/1430891)
**Author:** [@J-M-L](https://forum.arduino.cc/u/J-M-L)\ **Replies:** 22\ **Last updated:** [September 30, 2026, 12:19pm UTC](https://forum.arduino.cc/t/grounding-or-not-grounding-an-usb-shield-that-is-the-question/1430891 "2026-09-30T12:19:54Z")
I'm not at all a hardware expert—I'm a software engineer—but a recent discussion piqued my curiosity about whether grounding a USB shield is useful, necessary, or something to avoid entirely. The Universal Serial Bus Sp… --- ## [ATmega328(P)(B) Bootloader with EEPROM and User Interface](https://forum.arduino.cc/t/atmega328-p-b-bootloader-with-eeprom-and-user-interface/1461568)
**Author:** [@jfbron](https://forum.arduino.cc/u/jfbron)\ **Replies:** 1\ **Last updated:** [September 30, 2026, 11:52am UTC](https://forum.arduino.cc/t/atmega328-p-b-bootloader-with-eeprom-and-user-interface/1461568 "2026-09-30T11:52:21Z")
I have created a smaal bootloader (512 Bytes) for all ATmega variants, fully backward compatible with the exiting standard bootloader. It is using a smart-write, only writes when the new contents differs from the existin… --- ## [Help Acessing learning material with no Arduino Alvik](https://forum.arduino.cc/t/help-acessing-learning-material-with-no-arduino-alvik/1445727)
**Author:** [@rattini](https://forum.arduino.cc/u/rattini)\ **Replies:** 11\ **Last updated:** [September 30, 2026, 10:45am UTC](https://forum.arduino.cc/t/help-acessing-learning-material-with-no-arduino-alvik/1445727 "2026-09-30T10:45:06Z")
Please help me I have no Arduino Alvik and I am a beginner hobbyist on Arduino Uno what can I do to improve my programming skills and stop using Code Kit --- ## [Discourse update notifications](https://forum.arduino.cc/t/discourse-update-notifications/1457903)
**Author:** [@pert](https://forum.arduino.cc/u/pert)\ **Replies:** 30\ **Last updated:** [September 30, 2026, 10:30am UTC](https://forum.arduino.cc/t/discourse-update-notifications/1457903 "2026-09-30T10:30:53Z")
What are Discourse Updates? Arduino Forum uses the open source Discourse forum framework. In order for our forum to benefit from important fixes and enhancements, the version of the Discourse software used by Arduino For… --- ## [I2C problem - received byte does not match sent byte](https://forum.arduino.cc/t/i2c-problem-received-byte-does-not-match-sent-byte/1461295)
**Author:** [@mgb](https://forum.arduino.cc/u/mgb)\ **Replies:** 24\ **Last updated:** [September 30, 2026, 10:18am UTC](https://forum.arduino.cc/t/i2c-problem-received-byte-does-not-match-sent-byte/1461295 "2026-09-30T10:18:15Z")
I have a simple master/slave with I2C to link 2 Nanos. The problem is that the slave sends the byte 100000 but the master receives 11111111 The 2 nanos are each connected to separate laptops which provide the power thro… --- ## [Starship V3 today? (Part two)](https://forum.arduino.cc/t/starship-v3-today-part-two/1445304)
**Author:** [@EmilyJane](https://forum.arduino.cc/u/EmilyJane)\ **Replies:** 36\ **Last updated:** [September 30, 2026, 9:55am UTC](https://forum.arduino.cc/t/starship-v3-today-part-two/1445304 "2026-09-30T09:55:06Z")
The launch window opens at 5:30pm today(May 21). With new versions of booster and payload, neither of which are flight tested, any number of things can happen. Probably the least likely is a really spectacular explosion… --- ## [Programming guidance](https://forum.arduino.cc/t/programming-guidance/1458675)
**Author:** [@montyonthebonty](https://forum.arduino.cc/u/montyonthebonty)\ **Replies:** 47\ **Last updated:** [September 30, 2026, 9:33am UTC](https://forum.arduino.cc/t/programming-guidance/1458675 "2026-09-30T09:33:12Z")
Hi I've not done much with Arduinos, but I have done bits in other languages. I'm trying to build a gismo that will give you a location on a railway and give the name as well as (maybe) other information. The simplest… --- ## [How can I trigger a web-based image generator from an Arduino project?](https://forum.arduino.cc/t/how-can-i-trigger-a-web-based-image-generator-from-an-arduino-project/1461526)
**Author:** [@fatii\_dev](https://forum.arduino.cc/u/fatii_dev)\ **Replies:** 1\ **Last updated:** [September 30, 2026, 8:38am UTC](https://forum.arduino.cc/t/how-can-i-trigger-a-web-based-image-generator-from-an-arduino-project/1461526 "2026-09-30T08:38:12Z")
Hi everyone, I’m exploring a small Arduino project where an Arduino board could trigger or control a web-based image generation workflow. The basic idea is to use a physical input such as a push button, sensor, or pote… [Next page](https://forum.arduino.cc/latest.md?page=1)