12. After the crash, running i2cdetect -y 1 "works", but its extremely slow (takes 3-4 minutes to complete) and detects nothing. Failing that if you have access to an oscilloscope you can monitor the pins and run i2cdetect again. Some ideas what might cause the problem: Jun 17, 2022 · Hello, I am playing with Raspberry Pi Z W, and OV 5647 camera module hooked up with it through CIS cable. Then I tried installing the i2c-tools by using the command 'sudo apt-get install i2c-tools' but I get the following message attached in the file. 8kΩ抵抗でプルアップされています。 そのため、外部にプルアップ抵抗は不要です。 Jul 5, 2012 · sudo i2cdetect -y 1. The interface operates at 5V so I'm also using a logic level converter. The Raspberry Pi sends data to the PCF8574 via I2C. I tried adding the pi user to the spi and i2c groups, and adding udev rules as explained here and here , but even after rebooting, those had little effect. We'll go with the easy-to-use and low-cost DS1307. Raspberry Pi Engineer & Forum Moderator Posts: 16664 Joined: Wed Dec 04, 2013 11:27 am I don't know why it shows all addresses and how can I fix this. . , that's a chip I've worked with before** (and have a current project "in progress" that uses such at the moment). the I2C Bus on my Raspberry Pi 4 Model B is not working altough i2cdetect does detect targets. Sep 16, 2021 · I2C is a common circuit interconnection format. Raspberry Pi PR RaspberryPi(ラズパイ)でのI2C通信の有効化する方法と、i2c-toolsの使い方 i2cdetect コマンドを実行すると、以下の Jun 3, 2019 · 6by9 Raspberry Pi Engineer & Forum Moderator Posts: 16679 Joined: Wed Dec 04, 2013 11:27 am Location: ZZ9 Plural Z Alpha, aka just outside Cambridge. When I connected the all pins according to datasheet , raspberry pi doesn't detect i2c address. Prerequisite : Configuration of the Raspberry Pi in I2C Mar 25, 2014 · 1. Dec 30, 2014 · The latest Raspbian pulls in a 3. You are looking for the voltage level to pulse a digital sequence between high (3. I2C mode and Serial Mode. After using the i2cdetect -y 3, the SCL is set to IN, and neither i2cdetect -y 1 nor 3 detects anything. Mar 31, 2021 · I am working on a gas flow sensor SFM4100It's communcation protocol is i2c. Feb 22, 2015 · i have a raspberry pi b+ (model 1) the MCP23017 is the bus i used i have installed the latest version of raspbian (01-30-15) Harm. 21-v7+ embeddedbarsha Posts: 255 Joined: Mon Jun 26, 2023 8:22 am. Note this address. Nov 6, 2013 · First of all, what do you see when you type i2cdetect -y 1 (assuming you have 2nd version of Raspberry Pi, else type i2cdetect -y 0) ? Do you see an empty address i2c table ? If yes, then, According to the documentation here "There are two operating modes for the SRF02. However, nothing shows up for me. I get address '20' appear on the output of the 'i2cdetect -y 1' when I have the Quick2Wire MCP23017 IO Port Expander v0. ) and it worked. If a device is present it will respond to its address by pulling SDA to ground. Making statements based on opinion; back them up with references or personal experience. The wiringPi gpio command has a shortcut to the i2cdetect command and running it gives Screenshot (1). According to the docs, the Raspberry should use /dev/i2c-0 (port I2C0). Background & Software Setup. Double and Triple check and neither SDA or SCL are swapped. The i2c address is 0x76 according to the table. Sep 9, 2020 · sudo i2cdetect -y 1 (or 0, I2C bus number is hardware-dependent) If this gives you an address matrix, I2C is on and working. Raspberry Pi Engineer & Forum Moderator Posts: 16638 Joined: Wed Dec 04, 2013 11:27 am Apr 27, 2020 · Hi, I got a Ina219 current sensor. Aug 1, 2019 · Raspberry Pi 400 Raspberry Pi Pico General SDK MicroPython Other RP2040 boards; Software Raspberry Pi OS Raspberry Pi Connect Raspberry Pi Desktop for PC and Mac Other Android Debian FreeBSD Gentoo Linux Kernel NetBSD openSUSE Plan 9 Puppy Arch Pidora / Fedora RISCOS Ubuntu; Ye Olde Pi Shoppe i2cdetect works by putting each address on the bus in turn. Also, I get the same address errors when I check the raspberry pi's i2c without anything connected to the raspberry pi. Feb 10, 2021 · 6by9 Raspberry Pi Engineer & Forum Moderator Posts: 16541 Joined: Wed Dec 04, 2013 11:27 am Location: ZZ9 Plural Z Alpha, aka just outside Cambridge. That confirmed the hardware problem on the 1st Pi. sudo apt-get update && sudo apt-get dist-upgrade && reboot May 17, 2024 · Raspberry Pi Engineer & Forum Moderator Posts: 16670 Joined: dtoverlay=at24compatible-eeprom-swi2c pi@raspberrypi:~ $ i2cdetect -l i2c-0 i2c i2c-23-mux (chan_id 0 Oct 28, 2021 · If you want to use the i2c-tools package, you should start by reading the available documentation. K. This section explains how to enable I2C function for Raspberry Pi and operate I2C devices using I2C-tools. I2C センサーを使ってみよう (初めての I2C) I2C/SPIとは. So far so good. Raspberry Pi Store. 4 attached to the GPIO. The 1701 has a USBi programmer connected, and is responding to i2cdetect on address 0x51, but I'm not able to see the 1701 on the i2c bus. 2. To test the software, run the command i2cdetect -y 0 to see if there is anything connected. The USBi and 1701 can Jul 5, 2012 · I have installed i2c correctly on my B+ pi and when I first installed it an "i2cdetect -y 1" command showed no devices connected, and then correctly showed a single address when one i2c device was connected. Now run sudo reboot to reboot, and test the new software. – Oct 25, 2014 · O. Since we want to include an external module, we'll have to wire one up. Otherwise, skip it. For o2 gas, i2c address is 0x02. Something is pulling SDA to ground for every address. png. Im using a raspberry pi 3 B+ and at first I thought my I2C pins might be broken so I tried a different sensor and the raspberry pi detected it. Most of the times, i get Code: Select all. As to 3v vs 5v, I've seen pretty conflicting comments about whether this makes a difference. You're probably already familiar with the UART serial port, which allows you to open a login session from a serial terminal application, such as PuTTY. The Pi overheating is a symptom of the GPIO circuitry having been exposed to 5V at currents the internal protection circuitry can't handle (anything more than half a milliamp or so) . 35+ kernel which has extra support for I2S devices like the IQAudio and HiFiberry. e. Store information; Jul 8, 2020 · Raspberry Pi 400 Raspberry Pi Pico General SDK MicroPython Other RP2040 boards; Software Raspberry Pi OS Raspberry Pi Connect Raspberry Pi Desktop for PC and Mac Other Android Debian FreeBSD Gentoo Linux Kernel NetBSD openSUSE Plan 9 Puppy Arch Pidora / Fedora RISCOS Ubuntu; Ye Olde Pi Shoppe Oct 9, 2018 · Unfortunately, i2cdetect -y 3 does not detect anything, while i2cdetect -y 1 shows the address on 61. i2cdetect -y 1 fails with permission denied sudo i2cdetect -y -1 is successful group i2c includes user pi /dev/i2c-0 and /dev/i2c-1 have read/write for group i2c Feb 21, 2017 · Raspberry Pi 400 Raspberry Pi Pico General SDK MicroPython Other RP2040 boards; Software Raspberry Pi OS Raspberry Pi Connect Raspberry Pi Desktop for PC and Mac Other Android Debian FreeBSD Gentoo Linux Kernel NetBSD openSUSE Plan 9 Puppy Arch Pidora / Fedora RISCOS Ubuntu; Ye Olde Pi Shoppe To configure the software, we will add the Pi user to the I2C access group, by running the command sudo adduser pi i2c. Do this for all your i2c devices. 1. bust. The problem is that my Raspberry pi can't find it when using "sudo i2cdetect -y 1". Raspberry Pi 400 Raspberry Pi Pico General SDK MicroPython Other RP2040 boards; Software Raspberry Pi OS Raspberry Pi Connect Raspberry Pi Desktop for PC and Mac Other Android Debian FreeBSD Gentoo Linux Kernel NetBSD openSUSE Plan 9 Puppy Arch Pidora / Fedora RISCOS Ubuntu; Ye Olde Pi Shoppe Would appreciate if i2cdetect worked so I can confirm this though LOL I'm using a Raspberry Pi 3 B+ 2017 and raspbian stretch. In fact, when I enter the command line 'i2cdetect -y 1' in the console, it shows all addresses, even if nothing is plug to I2C SDA and SCL. Jan 14, 2020 · Hi there, I have some troubles with my raspberry pi 2 B+. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. But when problem appeared I connected my RTC DS1307 but it didn't affect on i2cdetect output. Jun 26, 2024 · Effectively, i2cdetect -y 1 won't show I'm going to probably include a lot of irrelevant details but anything in the name getting this to work. Nov 19, 2012 · Rev 1 Pi use i2cdetect -y 0 Rev 2 Pi use i2cdetect -y 1 My experience of COG (Chip OIn Glass) LCDs and I2C is that the series resistance of internal wiring is about 400R which means they are not very good at driving lows so the Pi does not see the necessary ACK, unless you pull the pullup resistors off of the Pi and add your own around 10k. Dec 7, 2018 · I tried to read it with my raspberry Pi 3, so I connected SDA SCL VDD GND as shown in pictures, but when I run the command "i2cdetect -y 1" on my Raspberry it shows no device connected to I2C interface (empty) like that: sudo i2cdetect -y 1 To list the devices on I2C 1 (the normal port) and sudo i2cdetect -y 0 Raspberry Pi power over ethernet and mount it outside (2018) i have a raspberry pi b+ (model 1) the MCP23017 is the bus i used i have installed the latest version of raspbian (01-30-15) Harm. I am trying to retrieve product ID of this camera module, but nothing shows up on i2c bus. Try to enable it, using the how-to in this article or using raspi-config, and then try to scan the I2C port again. Further I see the /dev/ttySC0 and /dev/ttySC1 devices, but I am not getting any traffic from ttySC1 which is connected up to a GPS module that is continuously streaming GPS and time data (traffic confirmed with an o'scope). 라즈비안을 설치하면 기본적으로 설치가 되며 혹시 설치가 안되어 있다면 다음의 라즈베리파이의 CLI 창에서 다음의 명령을 수행하여 설치합니다. (I used the SD card from the RPi 4B to RPi 3A+ so no modifications there). I2C、SPIはいずれも、Raspberry Piと各種IC(センサーなど)との間で通信するための規格の一種です。 以下は、センサーをI2CもしくはSPIで接続した場合の動作イメージです。 Apr 22, 2017 · I've been following a tutorial to hook up an electronic compass that relays info to the Pi via i2c. I didn't connect anything to my Raspberry Pi. i2cdetect -y 1 (or 0) If this gives you a permission error, perform the next step. Oct 12, 2017 · PhilE Raspberry Pi Engineer & Forum Moderator Posts: 6081 Joined: Mon Sep 29, 2014 1:07 pm Location: Cambridge I am trying to connect my GY-521 MPU6050 to my Raspberry Pi Zero W using I2C detect but I'm unable to find the MPU6050 on the table. txt looks like this: Apr 19, 2016 · Raspberry Pi 400 Raspberry Pi Pico General SDK MicroPython Other RP2040 boards; Software Raspberry Pi OS Raspberry Pi Connect Raspberry Pi Desktop for PC and Mac Other Android Debian FreeBSD Gentoo Linux Kernel NetBSD openSUSE Plan 9 Puppy Arch Pidora / Fedora RISCOS Ubuntu; Ye Olde Pi Shoppe Feb 23, 2016 · Using the uptime command on a Raspberry Pi; Using hwinfo Command on aRaspberry Pi; Getting CPU info using cpufetch on Raspberry Pi; Use lshw to get hardware information about a Raspberry Pi; Check Whether Raspberry Pi OS is 32-bit or 64-bit; Generate passwords using pwgen on Raspberry Pi; Benchmark a Raspberry Pi Using Vcgencmd Mar 8, 2019 · When I run i2cdetect -y 1 it runs and the grid shows up but no devices. 96 Oled display I2C バス 1 について、Raspberry Pi に接続された I2C デバイス一覧およびそれらのアドレスを確認します。 sudo i2cdetect -y 1 I2C デバイスには出荷時に 0x03 - 0x77 の範囲でアドレスが割り当てられています。 The PCF8574 is an 8 bit I/O expander which converts a parallel signal into I2C and vice-versa. sudo i2cdetect -y 1. There is only one i2c attached to the raspberry pi 2. This guide assists in helping a microcontroller/Raspberry Pi to find a connected I2C device. Store information; Nov 5, 2021 · Helpful answers are appreciated. Jul 19, 2018 · sudo i2cdetect -y 1 # will show 68 if I2C is on, but UU if overlay is actually active. On my setup, it returned this output, because there was nothing connected: Explore the concept of I2C, a synchronous, serial, half-duplex communication bus for integrated circuits. Oct 7, 2016 · I then followed this guide which shows how to enable the i2c display on the Raspberry Pi. 18. However i2cdetect -y 0 can not detect my device Jan 25, 2021 · i2cdetect -y 1. The only differences between my equipment and the tutorial's is that I am using a Raspberry Pi 3 with Python 3 already installed, and the HMC5883L compass I am using has been bundled with a few more sensors than that being used in the tutorial. OS: Raspberry Pi OS Jul 20, 2014 · Hi Joan, Thank you for your reply. You can use the methods presented in this article to verify the state of the I2C port on your Raspberry Pi. I tried using another Raspberry Pi, different wires, even another i2c device but it definitely can't Mar 16, 2022 · PhilE Raspberry Pi Engineer & Forum Moderator Posts: 6091 Joined: Mon Sep 29, 2014 1:07 pm Location: Cambridge Dec 7, 2019 · Raspberry Pi 400 Raspberry Pi Pico General SDK MicroPython Other RP2040 boards; Software Raspberry Pi OS Raspberry Pi Connect Raspberry Pi Desktop for PC and Mac Other Android Debian FreeBSD Gentoo Linux Kernel NetBSD openSUSE Plan 9 Puppy Arch Pidora / Fedora RISCOS Ubuntu; Ye Olde Pi Shoppe Nov 2, 2016 · As I mentioned above, I see the device show up in the i2cdetect utility as both address 0x48 and 0x49. Raspberry Pi Developers sudo i2cdetect -y 0 //or sudo i2cdetect -y 1 The 7 bit I2C address of all found devices will be shown (ignoring the R/W bit, so I2C Mar 13, 2018 · Thanks for contributing an answer to Raspberry Pi Stack Exchange! Please be sure to answer the question. Instead, users are expected to have it always connected to WiFi or Ethernet and keep time by checking the network. The Raspberry Pi has three types of serial interface on the GPIO header. Here's a few other strange things. I've just put SD card and installed default OS using NOOBS. txt' and adding suggested entries, I was able to run 'i2cdetect -y 1' successfully. The results using i2cdetect: pi@raspberrypi:~ $ sudo i2cdetec 対応ボード別ページ : Raspberry Pi / Pi Zero / micro:bit / TY51822r3 CHIRIMEN について / 対応デバイスリスト / 資料集 / Slack に参加 目次. This is easiest with v2/v3/HQ cameras as address 0x64 will respond on the camera module regardless of the camera regulator shutdown line. May 20, 2021 · I2C is most likely disabled. The PCF8574 then converts the I2C signal into a 4 bit parallel signal, which is relayed to the LCD. One thing, I'm changing over an old ebox->arduino mega->relay board system replacing the ebox and arduino with the pi. 이 주소를 확인해주는 명령이 i2cdetect 입니다. 해당 명령을 사용하려면 i2c-tools 패키지가 설치되어 있어야 합니다. May 28, 2015 · I'm running Rasbian with the kernel: Linux raspberrypi 3. Wed Oct 06, 2021 5:25 pm . sudo hwclock -D -r date # Get latest date from internet sudo hwclock -w # write that date to HW clock sudo hwclock -r # read the value of hw clock again Feb 5, 2024 · "i2cdetect -y 1" detects addresses with no connections. i2cdetect - y 1 or i2cdetect 1 Jun 22, 2021 · Raspberry PiのI2C 便利なRapsberry Piですが、I2C機能を使っていると、様々な問題に直面することがあります😥 プルアップ抵抗 この2つのピンはRaspberry Pi基板上で1. If it's powered up and has reset correctly it's I2C address should be in the range 0x20 - 0x27 . It would be difficult to make decipherable photos of the circuit, so I made a figure: In case the labels get lost, for the I2C the pins go like this: May 26, 2013 · i2cdetect 0 i2cdetect 1 should scan both buses separately, if your devices show up after one of the calls then that is the bus they are on. I have recentry bought a Raspberry pi 2 model B with NOOBS and when I run the command "sudo i2cdetect -y 1" this is the response I get: Error: Could not open file `/dev/i2c-1' or `/dev/i2c/1' : No such file or directory. 'uname -a' Aug 31, 2012 · To keep costs low, the Raspberry Pi does not include a Real Time Clock module. Very easy to use, it is lightweight and has a higher memory and computing capacity than the Arduino. RasberryPIのI2Cコマンド詳解¶. Oct 8, 2021 · i2cdetect problem. 3D Printer: Original Prusa Mini+ running OctoPi on a Pi4B 4GB. Apr 14, 1998 · Using a Pi 3 B (os:NOOBS) on kernel: Linux raspberrypi 4. Setup: - Raspberry Pi CM4 Lite (4GB, Rev 1. The pins that are used are SDA=3, SCL=5. Use the following diagram to connect the LCD to the Raspberry Pi via the PCF8574: Jun 8, 2016 · Thanks for contributing an answer to Raspberry Pi Stack Exchange! Please be sure to answer the question. Tue Feb 26, 2019 5:37 pm . May 12, 2016 · I'm attempting to get the i2c bus to work from a raspberry pi image created from yocto. When reading the output of gpio readall after rebooting the PI, the SDA and SCL are set to ALT0. Aug 26, 2014 · I'd like to interface it to an external PIC24H slave via I2C, but can't find it when running i2cdetect. i2cdetect is only showing the LCD at 0x20. You will see a table like in the attach figure. I have a Raspberry Pi 4 am running Raspberry Pi OS Lite 32 Bit I am trying to setup a 0. i2cdetect - y 1 or i2cdetect 1 Jun 28, 2020 · Raspberry Pi 400 Raspberry Pi Pico General SDK MicroPython Other RP2040 boards; Software Raspberry Pi OS Raspberry Pi Connect Raspberry Pi Desktop for PC and Mac Other Android Debian FreeBSD Gentoo Linux Kernel NetBSD openSUSE Plan 9 Puppy Arch Pidora / Fedora RISCOS Ubuntu; Ye Olde Pi Shoppe For sale Wanted; Off topic Off topic discussion Feb 28, 2016 · i2cdetect showing all addresses is a symptom of the SDA GPIO being permanently connected to ground, i. Jun 13, 2020 · Thanks for contributing an answer to Raspberry Pi Stack Exchange! Please be sure to answer the question. Mar 22, 2015 · I believe that it is wired correctly, as it is detected by i2cdetect, and reports the address (0x20) that I know it to use. Apr 26, 2023 · I tried swapping sudo i2cdetect -y 1 with sudo i2cdetect -y 0 and it returned Error: Could not open file `/dev/i2c-0′ or `/dev/i2c/0′: No such file or directory But when I swapped the Raspberry Pi 4B with a Raspberry Pi 3A+ it detected the Slave on the first try. I tried to follow the same tuto on another Pi (model B+) and it worked right away. sudo hwclock -r Review and update reading from hw clock. ssnover Posts: 1 Joined: Tue Feb 26, 2019 5:34 pm. I tried to use the Raspberry Pi Sense HAT and the SSD1306 OLED display and the PCA9685 Servo Driver with the I2C Bus. Re: i2c user permission. Nov 13, 2012 · I have Raspberry made in 2011,12 and need to use I2C there. We will see in this tutorial how to drive several servomotors with a Raspberry Pi and a PCA9685 module. May 23, 2016 · Then I changed the Raspberry Pi 3 board, and presto, the search finished instantly (and found RTC unless the contact between pins and addon board was poor). Oct 2, 2018 · Raspberry Pi 400 Raspberry Pi Pico General SDK MicroPython Other RP2040 boards; Software Raspberry Pi OS Raspberry Pi Connect Raspberry Pi Desktop for PC and Mac Other Android Debian FreeBSD Gentoo Linux Kernel NetBSD openSUSE Plan 9 Puppy Arch Pidora / Fedora RISCOS Ubuntu; Ye Olde Pi Shoppe How do you allow non-root users to access I2C on the Raspberry Pi 2? I've compiled this code for accessing an MPU6050 sensor via I2C, and it works perfectly, but only when I call it via sudo. 1) with IO Board running Bookworm 12 Feb 19, 2023 · If not, then connect one camera at a time (do NOT hotplug) and use "sudo i2cdetect -y 0" and "sudo i2cdetect -y 10" to identify which camera module reports on which bus. I tried to run i2cdetect on another Pi (exactly the same as the 1st Pi), using the SD card from the first Pi (so same config, files, etc. Additionally, if it did not work at all with 5V I am assuming (per first sentence) it would not show up with i2cdetect. Raspberry Pi OS 6. Dec 15, 2019 · Raspberry Pi 400 Raspberry Pi Pico General SDK MicroPython Other RP2040 boards; Software Raspberry Pi OS Raspberry Pi Connect Raspberry Pi Desktop for PC and Mac Other Android Debian FreeBSD Gentoo Linux Kernel NetBSD openSUSE Plan 9 Puppy Arch Pidora / Fedora RISCOS Ubuntu; Ye Olde Pi Shoppe Jan 19, 2013 · $ sudo i2cdetect -y 0 (or 1) May just restart from absolute beginning with both recommended distro by Raspberry Pi Foundation and Adafruit version. May 5, 2020 · I have a Raspberry Pi 4B and I'm trying to hook it up with a 4x20 character LCD using a PCF8574T-based I2C interface. I went further, and tested Raspberry Pi 1, and again, search is lighting fast. RasberryPIは容易にI2Cバスに機器が容易に接続でき、また、 Linuxからのアクセスコマンドが充実している。 Jul 30, 2013 · Hi, After searching some more, came across below Web page by Adafruits and after modifying the '/boot/config. Two items I'd recommend are: The summary & system manuals for i2c-tools provides a useful overview, and has links to the I2C Wiki, and the git source tree. Create an I2C usergroup, apply it to the bus and add your user to this group: sudo groupadd i2c (group may exist already) Connect one of your i2c devices while your raspberry pi is of, start your raspberry pi and run. Mar 25, 2021 · To be more clear, running the step i2cdetect -y 1 crashes my PI. I usually respond to Tweets directed at me. When I try to run the command sudo i2cdetect -y 1 it should displays the information about the i2c devices connected. I have attach a BMP280 temp and barometric pressure sensor. 14. Jul 15, 2023 · when running sudo i2cdetect -y1 when the device is powered, no address is shown (Default address is 0x59) if I run the above script [Errno 121] occurs, however the device is detected when running sudo i2cdetect -y1 after script execution, if I run the same command again the device disappear (address is no longer shown in the table). 7-v7+ #755 SMP PREEMPT Thu Feb 12 17:20:48 GMT 2015 armv7l GNU/Linux. Raspberry Pi 400 Raspberry Pi Pico General SDK MicroPython Other RP2040 boards; Software Raspberry Pi OS Raspberry Pi Connect Raspberry Pi Desktop for PC and Mac Other Android Debian FreeBSD Gentoo Linux Kernel NetBSD openSUSE Plan 9 Puppy Arch Pidora / Fedora RISCOS Ubuntu; Ye Olde Pi Shoppe Sep 27, 2020 · The Raspberry Pi is a microcontroller with integrated Bluetooth and Wifi modules. Jul 18, 2018 · Hi! So for my project, the I2C1 signals were brought down from the Pi Zero W through the 40-pin header onto my carrier PCB, on which these I2C1 signals (pins 3 & 5 on Pi Zero W) are connected to a RTC chip DS3231Mz+ and an ADC chip MCP3425A0T-E/CH. sudo i2cdetect -y 1-> displays a table with a '68' at column 8, row 60. And according to gasses bus adresses are changing. I have looked at other peoples solutions but they are all o do with raspbian or some other flavour of os. 98-v7+ #1200 SMP Tue Feb 12 20:27:48 GMT 2019 armv7l GNU/Linux I activated i2c in my config and made sure to add it to the modules as well as the tools package and python-smbus. My /boot/config. Thanks to joan Feb 5, 2024 · "i2cdetect -y 1" detects addresses with no connections. The PIC24H is setup as a slave (SCL is released, slave address = 0x30) and running in i2c idle, using the xc16 i2c peripheral library. 3v) and low (0v) on Hi, I am trying to use i2cdetect command but I get the message 'command not found'. bv lo ap qa mb gw ll ms gr ui