Esp32 i2c scanner

Esp32 i2c scanner. Readme. Both lines require pull-up resistors. We would like to show you a description here but the site won’t allow us. Broken/fried Sensor. ESP8266/ESP32 I2C Scanner May 3, 2024 · PrometheusWannaB3 commented last month. I have changed the Wire to Wire1 and added the SDA/SCL values as suggested in the Adafruit start guide. A lot of breakout boards use Inter-Integrate Circuit (I2C) to communicate with the host microcontroller. // The original author is not know. The Serial Monitor prints "Scanning No I2C devices found". The reset cleared the SDA line and the scan successfully worked on the second attempt. An I2C message on a lower bit-level looks something like this: An I2C Message. Then there is a bit signifying whether the controller wants to read or write. hcccs January 3, 2021, 7:35pm 1. However, if determining the I2C address is tricky, you may need to use an I2C scanner sketch. However, if you manually disabled it, you'll need to enable it for the scan to work. The LC709203 battery monitor (highlighted in red) is located slightly above and to the left of the BME280, directly under the USB pin label on the silk. Jul 24, 2023 · Adafruit MCP9808 High Accuracy I2C Temperature Sensor Breakout. With such advantages as simplicity and low manufacturing cost, I2C is mostly Dec 23, 2020 · ESP32 i2c_scanner. You will see the address of the OLED. This scanner will determine the number of I2C devices connected with ESP32. Attenuation must be applied in order to increase this usable voltage range. ESP32-C3 supports both I2C Standard-mode (Sm) and Fast-mode (Fm) which can go up to 100KHz and 400KHz respectively. upload the code, and open serial monitor, to check the i2c address, where it was 0x76. 985 I2C: BME280 found at 0x77 00:00:03. scl (Optional, Pin): The pin for the clock line of the I²C bus. With I2C, you just need 2 physical wires for your devices to communicate with each other. This project consists of two examples: master and slave which will be flashed on separate ESP32 boards. Now upload the scanning sketch to your microcontroller and open the serial port to see the output. The slave mode, the clock is generated by the master device and responds to the master if the destination address is the same as the destination. Oct 5, 2023 · Address Conflicts : Use an I2C scanner code to confirm that no two devices share the same address. added the 0 after I2C (. I can't get the I2C_scanner to work - it says there are no devices. ini configuration on a ESP32-WROOM: platform = espressif32@3. println (); Serial. I2Cbus. Sep 7, 2022 · ESP32 I2C Master Slave Communication with ESP-IDF. Mar 3, 2022 · Scan I2C Address with ESP32. Below is a quick reference for ESP32-based boards. ESP8266/ESP32 I2C Scanner Quick reference for the ESP32. Now as you turn the knob on the potentiometer, you will start to see the first row of rectangles. Capacitive digital sensor for relative humidity and temperature. Apr 5, 2023 · 3. println ("I2C scanner. I2C Scanner. I did my first test with I2C Interface using Arduino IDE. The first section of output is what happens when the SDA line is held low by the ESP32. Jan 5, 2022 · If the I2C scanner sketch returns 0x76 or any other address and you still can’t get it working, go to issue 4. 7%. You need to use the correct I2C ESP32 pins. The PCF8574 is connected to the Arduino as follows: VCC -> 5V. We’ll discuss how ESP32 I2C works, how to change I2C default pins (SDA, SCL), how to connect multiple I2C devices on the bus with proper addressing, and how to create an ESP32 I2C scanner to check for available I2C devices on the bus and get their addresses. google Wiring an OLED display module to an ESP32. h library, to connect the LCD 162 display to the I2C bus. The I2C scan code will show the address (es) from the built in sensor (s) and the MCP9808. Jan 26, 2024 · I2C is a popular serial communication protocol in embedded systems. 2%. I2C Slave Mode. The library APIs are very similar to the standard LiquidCrystal The ESP32 works fine when I attach the bq24295 PMIC via I2C. note it down, and get back to our previous sample code, and type the address, in the sensor initialization line, as shown. I can't change this. We’ll use the LiquidCrystal I2C library in Arduino Core, together with the I2C Wire. I2C scanner for ESP-IDF. With such advantages as simplicity and low manufacturing cost, I2C is mostly used for communication of low-speed peripheral devices over short distances (within one foot). If your microcontroller can’t find the sensor’s I2C address and you’re sure the wiring is correct, you probably have a hardware problem: your sensor might be broken; faulty wires; Nov 25, 2021 · The BME280 temperature, humidity and pressure sensor (highlighted in green) is located above the center of the board, at the top right corner of the STEMMA QT connector. I2C is a serial, synchronous, half-duplex communication protocol that allows co-existence of multiple masters and slaves on the same bus. Without it, the QT port will not work! Nov 25, 2021 · The Feather ESP32-S2 only has one I2C port, Wire, that is on pins SDA and SCL and shared with the STEMMA QT connector. The MCP9808 digital temperature sensor is one of the more accurate/precise we've ever seen, with a typical accuracy of ±0. It is based on I2Cdev by Jeff Rowberg. h> // for I2C with RTC module #include "RTClib. Neither of the I2C ports have pullup resistors installed. I have tested the displays and they both produce the test picture. You should see stuff like this: PowerManagement • Fine-resolutionpowercontrolthroughaselectionofclockfrequency,dutycycle,Wi-Fioperatingmodes, andindividualpowercontrolofinternalcomponents Aug 16, 2022 · There is a TFT_I2C_POWER pin on the ESP32-S3 TFT Feather. The first section of output is what happens when the SDA line is held low by the ESP32 What's smaller than a Feather but larger than a Trinket? It's an Adafruit ItsyBitsy ESP32, a powerful processor PCB with a plethora of pins! It features the ESP32 Pico module, an FCC-certified module that contains an ESP32 chip with dual-core 240MHz Tensilica processor, WiFi, and Bluetooth classic + BLE, configured with 8 MB of Flash memory, and 2 MB of PSRAM. The controller sends out instructions through the I2C bus on the data pin (SDA), and the instructions are prefaced with the address, so that only the correct device listens. In this tutorial, you’ll learn about ESP32 I2C communication protocol (in Arduino IDE). Mar 16, 2022 · The Feather ESP32 V2 does not have I2C pullup resistors - make sure any sensor you attach to the I2C port has resistors or add them yourself. Below is a sketch that displays the results of the WiFi scan on the OLED using the U8x8 version of the display library . It's like an all-in-one display interface development board, powered by the fantastic ESP32-S2 WiFi module. The I2CScanner Library implements a scanner to locate I2C devices, and determine if a device is connected. I2C is commonly found in sensors and interface boards as it offers a compact implementation with decent speeds reaching Mbps. 0v (anything above 1. writeto(42, b'123') # write 3 bytes to slave with 7-bit address 42 i2c. When using breakouts that include STEMMA or STEMMA QT connectors, usage is essentially plug-and-play. Apr 20, 2022 · The Feather ESP32-S3 comes with 1-2 I2C sensor (s) built in: the MAX17048 OR the LC709203, and optionally, the BME280. Jul 14, 2019 · The PCF8574 is a 8-bit input/output (I/O) expander for the two-line bidirectional bus (I2C) and designed for operation voltages between 2. I2C interface library in C++ for working with Espressif ESP32 IoT Development Framework (esp-idf), that supports master mode. Connections are straightforward. The ESP32-S3 TFT Feather comes with one I2C sensor built in. 2 Feb 20, 2022 · To solve this, first we need to find the, i2c address of the bmp sensor, with i2c scanner, like our previous tutorials, link for the code here. 16-channel PWM driver default address. ESP32 is a SoC that’s equipped with different serial protocols including I2C. Mode cepat : 400 Kbit/sec. Mar 17, 2022 · Hello all, I’m having some problems with I2C using this . h library in Arduino Core to interface LCD 16×2 display via the I2C bus. The Feather ESP32-S2 also has a power 'switch' on the I2C port. Let’s hook the OLED display to the ESP32. Insights. Golden Rule : multiple I2C devices on a single bus is a straightforward and efficient way to augment the capabilities of your microcontroller setup Oct 18, 2017 · Here is a I2C scanner that works on ESP32's. Another common name used is also Two-Wire Interface (TWI), since, well, it is. Mar 16, 2022 · The ESP32 Feather V2 is a significant redesign of the original! It includes 8MB of flash, 2MB of PSRAM, a NeoPixel, a user button switch, a STEMMA QT port, and much more! The ESP32 has both WiFi and Bluetooth Classic/LE support, making it perfect for just about any wireless or internet-connected project! FXOS8700: 6-axis sensor with integrated linear accelerometer and magnetometer, I2C/TwoWire addresses: 0x1c, 0x1d, 0x1f, 0x1e. If a device is found, it is reported to the Arduino serial monitor. Generally, the I2C address of the 128*64 OLED is 0x3C. readfrom(42, 4) # read 4 bytes from slave with 7-bit Jun 26, 2022 · i2c: - id: bus_a sda: GPIO15 scl: GPIO4 - id: bus_b sda: GPIO13 scl: GPIO14 scan: true pcf8574: - id: 'pcf8575_hub' address: 0x20 i2c_id: bus_b pcf8575: true Important field is “address” without it my setup for some reason did not work. I2C I2C (pronounced i-squared-c) is a serial communication bus – invented by Philips in 1982 – that allows two or more devices to communicate. So let us begin! We have a same guide with Arduino: TCA9548A I2C Multiplexer Arduino Use Same Address I2C Devices Feb 1, 2018 · ESP32 - I2C Scanner using Arduino IDE (working) Postby jgustavoam » Sat Feb 17, 2018 3:17 pm. The sketch detects it and I can write some bytes to it. Add to Cart. Board ESP32-IoT-Uno có 2 I'm trying to connect an OLED SSD 1306 screen to a ESP32 module (in particular, a ESP32-WROOM-32, from the brand AZ delivery). Feb 1, 2018 · Re: ESP32 - I2C Scanner using Arduino IDE (working) Post by jgustavoam » Sun Feb 09, 2020 1:13 pm If you do not intend to use external pullup resistors for the I2C interface, you can configure internal pullups. Dec 23, 2020 · ESP32 i2c_scanner. I am trying to run i2c-tool app as it is after changing SCL and SDA pin number as my connection. The Debug output shows my problem. Connect your Scanner Device alone with ESP32 Board and run the "Scanner Program/sketch' of Step-5; note down the reported slaveAddress and post it. Check that the addresses of the OKED and Scanner devices are different and then connect both devices with the I2C Bus of ESP32 Board. The devices connected to the bus can… 직렬 연결의 전송 속도 만 ESP32에서 사용하기 쉬운 115200bps로 변경되었습니다. I2C will work fine if run much slower with higher pull-ups. Sep 22, 2017 · These are pin numbers for the I2C controlled OLED on the board. RTC module is having attached battery also. The I2C can be used in two different modes: I2C Master Mode. Compatibility. You will see the backlight lit up. Time out for I2C communication handled,So software not stuck in any loop & other functionalities working fine. Wire1 is the secondary port, and is available on the STEMMA QT port on the end of the board Jan 12, 2022 · Adafruit MCP9808 High Accuracy I2C Temperature Sensor Breakout. 96 KHz). This is done by setting several parameters contained in i2c_config_t structure: I2C operation mode - select either slave or master from i2c_opmode_t. I am attempting to run an I2C scan and have tried several different codes found online; I am currently trying with the code below. The situation is that the I2C address as returned by the scanner (ST environment) is not the same to that of Arduino I2C scanner. The I2C bus consists of two lines: serial data line (SDA) and serial clock (SCL). Installation. Here is ESP32 with Arduino IDE Step by step Programing. What a cutie pie! Or is it a QT Py? This diminutive dev board comes with a RISC-V IoT microcontroller, the ESP32-C3! Defaults to the default of your board (usually GPIO21 for ESP32 and GPIO4 for ESP8266). We’ll take a look at the I2C communication protocol with the ESP32 using Arduino IDE 2This very simple sketch scans the I2C-bus for devices. The Reverse TFT Feather comes with the 240x135 color TFT display on the back-side not the front-side. If a device is f Mar 27, 2023 · I2C is a cost-effective serial protocol that’s embedded in most electronic devices. In this tutorial, you’ll learn how to use ESP32 (or ESP8266) with the I2C LCD Display module (PCF8574) in Arduino IDE. In Stock. 974 I2C: BME280 found at 0x76 00:00:03. The first step to establishing I2C communication is to configure the driver. I touched EN (reset) on my WeMos bluetooth&battery. Sesuai dengan lembar data ESP32, antarmuka I2C dari ESP32 mendukung: Mode standar : 100 Kbit/sec. Examples 3. i2c = machine. 0. That makes it great for panel-mounted projects, especially with the included buttons. 3V output and the GND pin to ground. When i pull down the SDA momentarily by shorting SDA to GND, I2C comes back to working condition. If that happens, Congratulations! Sep 10, 2021 · Also, the VCC of RTC is connected to 3V3 of ESP32 and the GND of RTC is also connected to GND of ESP32 . 987 I2C: BH1750 found at 0x23 ESP32-S2 has 2 I2C controller (also called port), responsible for handling communication on the I2C bus. I'm using a regular I2C scanner, which doesn't recognize the screen. 25°C over the sensor's -40°C to $4. If it is your first time working with this board it may be useful to get an overview of the microcontroller: General information about the ESP32 port. Code: Mar 14, 2022 · What's life without a little RISC? This miniature dev board is perfect for small projects: it comes with our favorite connector - the STEMMA QT, a chainable I2C port, WiFi, Bluetooth LE, and plenty of FLASH and RAM memory for many IoT projects. I2C Devices; I2C Addresses; I2C Resources; Search. It is enabled by default in CircuitPython, so there's no action to be done on your part. Its device ID is 0x68 and I ran arduino example code for same pins and it is working fine. Overview. 5V and 6V. I2C Scanner – MicroPython. Settings of the communication pins: GPIO pin numbers assigned to the SDA and SCL signals. Dec 22, 2021 · The QT Py ESP32-S2 has TWO I2C ports!. Jun 3, 2022 · We have no way of knowing what you did. The code I used is: Wire. Pin (9), sda=machine. begin(9600); Mar 8, 2024 · Overview. The library APIs are very similar to the standard LiquidCrystal library in Arduino that we Jan 3, 2021 · Using Arduino Programming Questions. To review, open the file in an editor that reveals hidden Unicode characters. ESP32 mendukung komunikasi I2C melalui dua antarmuka bus I2C yang dapat berfungsi sebagai master atau slave I2C, tergantung pada konfigurasi pengguna. If your microcontroller can’t find the sensor’s I2C address and you’re sure the wiring is correct, you probably have a hardware problem: your sensor might be broken; faulty wires; Aug 23, 2022 · Antarmuka Bus ESP32 I2C. // ----- // i2c_scanner // // Version 1 // This program (or code that looks like it) // can be found in many places. If a device is f I2C is a serial, synchronous, half-duplex communication protocol that allows co-existence of multiple masters and slaves on the same bus. " GitHub is where people build software. Additionally, we will interface ESP32 with different sensors and devices that communicate via I2C protocol and program our board to run an I2C scanner. 0v and 1. Dec 24, 2019 · Here I2C communication is used between OLED and ESP32, so we need the I2C address of the display. When i probe the I2C lines, SDA is always HIGH and clock Coming continuously on SCL. Its I2C address is 0x77. On the I2C module you will find a potentiometer that you can rotate with a small screwdriver. ESP8266/ESP32 I2C Scanner May 4, 2017 · At this state, Reading of all 3 slaves are failing. Wire1 is the secondary port, and is available on the STEMMA QT port on the end of the board (outlined in green). More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. Feb 27, 2024 · The MCP9808 comes with a STEMMA QT connector, which makes wiring it up quite simple and solder-free. I2C Devices. Install platformio. cc forum. This tells the display library which pins to use to communicate with the display. Pull-ups need to be ~10k. no idea if it's a new version thing or because I'm using a pi pico instead of esp32, but I had to use an extra argument for the I2C. With such advantages as simplicity and low manufacturing cost, I2C is mostly used for CMake 18. Whatever I try the Serial monitor shows no devices found. Mar 10, 2022 · In this article, we’ll learn how to utilize the Arduino IDE with the ESP32 (or ESP8266) and the I2C LCD Display module (PCF8574). Oct 18, 2017 · Here is a I2C scanner that works on ESP32's The Debug output shows my problem. If you want to find the I2C address of a specific sensor, display, or any other I2C peripheral, connect it to the Raspberry Pi Pico I2C pins and then run the I2C scanner code provided. The boards will be connected with each other via the I2C communication pins that will be set in code. Jul 27, 2023 · Hi there, I'm using a QT PY ESP32-S2 and an LIS3DH accelerometer with STEMMA QT. Counter to UART, I2C allows multiple devices (up to 127) to tap into the Jun 15, 2022 · The QT Py ESP32-S2 has TWO I2C ports! Wire is the default port, and is available on the SDA and SCL pins on the castellated side pads (outlined in blue). Defaults to the default of your board (usually GPIO22 for ESP32 and GPIO5 for ESP8266). Contribute to UncleRus/esp-idf-i2cscan development by creating an account on GitHub. Trong đó dây SCL có tác dụng để đồng bộ hóa giữa các thiết bị khi truyền dữ liệu, còn SDA là dây dữ liệu truyền qua. HTS221. In this mode, the ESP32 generates the clock signal and initiates the communication with the slave device. With such advantages as simplicity and low manufacturing cost, I2C is mostly used for Aug 19, 2022 · Introduction to I 2 C protocol. Here are the screenshots from the logic analyzer. 0v will just read as 4095). However, if i use the Arduino app with esp32 2. I2C (0, scl=machine. esp-idf_i2c_scan This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. Begin by connecting the VCC pin to the ESP32’s 3. 3. ESP32-C3 has 1 I2C controller (also referred to as Jan 5, 2022 · If the I2C scanner sketch returns 0x76 or any other address and you still can’t get it working, go to issue 4. When I scan for I2C addresses using the below code, it returns the following four addresses: 0x3A. Plug in the ESP32’s USB connector to power the LCD. Typically, an I2C slave device has a 7-bit address or 10-bit address. Use the machine. And it works ! Very simple ! The I2C clock frequency is almost 100 KHz (97. NXP Semiconductors. It’s a practical approach where you’re only limitation is bus speed and distance. The I2C address is usually listed on the datasheet of the component. 00:00:03. It was invented in 1982 by Philips Semiconductors. If a device is f Oct 13, 2023 · Ví dụ về kết nối oled bằng I2C có thể xem ở đây. May 3, 2024 · PrometheusWannaB3 commented last month. ADC class: Sep 23, 2020 · Problem Description. if you have done all the necessary settings and connections correctly, then after starting (or restarting) the ESP you will see all the found I²C devices. A single I2C controller can be a master or a slave. Components Required. So let us begin! We have a same guide with Arduino: TCA9548A I2C Multiplexer Arduino Use Same Address I2C Devices Oct 9, 2017 · In today’s tutorial I’ll explain you how to interface the esp32 chip to external devices (sensors, displays…) using a very widespread bus: the I2C bus. Finally, connect the SCL and SDA pins to the ESP32’s I2C pins D22 and D21, respectively. I have most updated code from esp-idf and this same hardware config is working fine in Arduino IDE. GitHub Gist: instantly share code, notes, and snippets. i2c_scanner in Arduino Playground is a very simple sketch scans the I2C-bus for devices. from machine import I2C i2c = I2C(freq=400000) # create I2C peripheral at frequency of 400kHz # depending on the port, extra parameters may be required # to select the peripheral and/or pins to use i2c. NOTE > PCF8574 - max frequency = 100 KHz (does not work with 400 KHz). PCA9685. In this section, we will build and test a project using the I2C driver library for ESP-IDF. Wire is the default port, and is available on the SDA and SCL pins on the castellated side pads. i2cdetect is not detecting my MPU9250. Explained How to Scan I2C port with ESP32#ESP32 #ESP32_I2C #voidloopRobotechCode: https://drive. 5. ESP32-S2 supports both I2C Standard-mode (Sm) and Fast-mode (Fm) which can go up to 100KHz and 400KHz respectively. Jul 10, 2023 · We’ll take a look at the I2C communication protocol with the ESP32 using Arduino IDE 2This very simple sketch scans the I2C-bus for devices. Each slave on the bus has its own address, a hexadecimal number that allows the ESP32 to communicate with each device using I2C communication. It does have a built in battery monitor that is listening on address 0x0B, so that address cannot be used by other devices. I2C ( Inter-Integrated Circuit , eye-squared-C) is alternatively known as I2C or IIC. i2c_scanner. Then we will program our board to run an I2C scanner. The Espressif ESP32 Development Board (image attribution: Adafruit). The I2C device we will be using is a nRF52 TWIS described in our previous article having slave address of 0x11 and send 5 bytes of data from 1 to 5. (Additionally whenever Mar 17, 2022 · The goal is to use the LSM9DS0 with a ST chip. I had 2 i2c hence the i2c_id field requirement. # I2C Scanner MicroPython from machine import Pin, SoftI2C. ESP32-S2 has 2 I2C controller (also called port), responsible for handling communication on the I2C bus. Note that, when using the default configuration, input voltages on the ADC pin must be between 0. Aug 17, 2022 · \$\begingroup\$ I don't know how often you're doing I2C bus transfers but aren't these low-value resistors like 4K7 going to drain your battery harder than it needs to be? I'd have expected very low currents everywhere in a power-conscious design like a smartwatch. If you run this and it seems to hang, try manually unlocking your I2C bus by running the following two commands from the REPL. It is a synchronous , multi-master, multi-slave, packet switched, single-ended, serial communication bus . The ESP32 is 3V3, your device needs to be the same. To associate your repository with the i2c-scanner topic, visit your repo's landing page and select "manage topics. // For example on the Arduino. The standby current consumption is very low with 10μA. 95. On the ESP32 ADC functionality is available on Pins 32-39. h" //to show time RTC_DS3231 rtc; void Scanner () { Serial. Fire up a serial monitor. 4. Aug 16, 2022 · Adafruit MCP9808 High Accuracy I2C Temperature Sensor Breakout. Giao tiếp I2C sử dụng 2 dây để kết nối là SCL (Serial Clock) và SDA (Serial Data). Makefile 7. To find the I2C address of the OLED module, connect the OLED module with the ESP32 and upload the below code and open the serial monitor. I have connected a Wemos OLED ESP32 with another OLED display and a 3-wire DHT11 sensor breakout (with pull-up resistor). The Feather ESP32 V2 has a NEOPIXEL_I2C_POWER pin that must be pulled HIGH to enable power to the STEMMA QT port. scan() # scan for slaves, returning a list of 7-bit addresses i2c. It can be run on ESP32 to scan your connected I2C device and print its I2C address. Feb 3, 2021 · For ESP32 recommend using GPIO pins - SDA on GPIO21 and SCL on GPIO22. \$\endgroup\$ – Using Multiple Slave I2C Devices with ESP32 (I2C devices with different addresses) In this section, we will first connect three different I2C devices with the ESP32 board using the default I2C pins. The intention of this library is to read and write to I2C slave devices (most sensors) with ease, by providing quick and specific functions aimed for 8-bit data. begin(); Serial. Show WifiScan Sketch Display on OLED. 0 board = esp32doit-devkit-v1 framework = arduino The code i’m running is a simple i2c scanner, and the result is that it sistematically shows a device and right on the next scan (every 5 sec) it doesnt show any device. Pin (8)) Micropython i2c scanner. We’ll be using the LiquidCrystal_I2C library with I2C Wire. Following is the code: #include <Wire. With such advantages as simplicity and low manufacturing cost, I2C is mostly used for We’ll take a look at the I2C communication protocol with the ESP32 using Arduino IDE 2This very simple sketch scans the I2C-bus for devices. scan (Optional, boolean): If ESPHome Jul 14, 2019 · The PCF8574 is a 8-bit input/output (I/O) expander for the two-line bidirectional bus (I2C) and designed for operation voltages between 2. You need to activate the power port by I2C Modes. This is a nice general purpose communication bus that only requires two pins for the data transmission. I am using a STM32 Nucleo-F429 and ESP32 devkit. ST Microelectronics. platformio run --target upload. Open Thonny IDE, or the IDE of your choice, and copy the following code. ESP32 development board; SSD1306 OLED Display; BME280 sensor; MPU6050 ESP32-C3 has 1 I2C controller (also called port), responsible for handling communication on the I2C bus. In this section, we will build and test a project using I2C driver described in the previous section. Power Requirements : Ensure that all devices have the appropriate voltage levels and power supply. Our objective is to configure ESP32 as a Master device and read data from an I2C device. I2C Resources; Search. Scans the I2C bus, printing out any addresses that correctly start an I2C protocol transmission. Plug a STEMMA QT to STEMMA QT cable into the port on the ItsyBitsy ESP32 and a port on the MCP9808 breakout. qb bt dj qu re va gh ba jb db