Esphome gpio pullup not working. jubueche Posts: 32 Joined: Sat Jan 19, 2019 4:03 pm.

Esphome gpio pullup not working GPIO pin as GND and 3v3. [binary_sensor. Hi all, I have read other articles on how to flash a Sonoff Basic with ESPHome. The problem seems to come from the fact that, to boot in "normal" mode, GPIO2 must be high on the ESP and the TTP223B pulls the IO low when in "open" state. The issue exists on both ESP86xx and ESP32-IDF Haven't After updating ESPHome to 2022. wemos_test remains “off”. The difference between "switch" and "output" is that switch is something that would show up in home assistant and can be controlled from there. To have a GPIO pin in the Home Assistant frontend, please see the GPIO Switch. They literally do nothing. 6 to the latest available and in both devices the binary sensors configured for the touchscreen stopped working, downgrading solves the problem. But I have one issue at this time, maybe 0/6/DS-15901-Weather_Meter. True, but it's worth to note that not all gpio pins have internal pullup resistors. Been having issue with running deep_sleep, was hoping that esphome/esphome#3066 would resolve the issue, but still having a problem after pulling latest dev branch with pip. 5 to 2024. I’m using esphome. I am trying to make my water valve turn on after a hall float sensor triggers and has been on for a given time. switch: - platform: gpio name: "Wemos_Switch" pin: number: D1 inverted: False mode: INPUT_PULLUP ESPHome is a framework for working with ESP devices, and making them easier to setup and use in a home automation environment. reed switch working great tho, i can see state changes in HA right away when i move the Frequently Asked Questions¶ Tips for using ESPHome¶. 3 posts • Page 1 of 1. 0-dev on HA Supervisor-2021. This issue has been automatically marked as stale because it has not had recent activity. 5V) So in general you can assume 5V relay do work perfectly fine on 3. Numerous Adafruit Feather so I have an esp32 devkitc in use, and I want to control an (existing) relay with a pushbutton. Running raspi-gpio with the help argument prints this help. I don’t get a stable readout. The one_wire component allows you to use supported 1-Wire devices in ESPHome. Connecting all Pins (CS, RST, DC, SDI, SCK, BL, SDO) the display turns completely white using the This is why its important to read through the Docs. Trying to use two push buttons on a NodeMCU v3 (no resistance), three relays to move a cover any way D4 working great but D3 (or any other) is not! captive_portal: switch: # Relay que energiza el transformador de 24 V. I use this script, and the enable_timer is always turned off after reboot. 85 / 1. Edit your binary_sensor section like so: binary_sensor: - platform: gpio pin: number: 13 mode: input: true pullup: true id: bucket name: "water bucket" Does prolonged shorting of a gpio pin and ground damage a nodemcu board? Shorted by a magnetic contact sensor? the door is open alot this is when power flows from gpio 1 and ground after a prolonged time open the contact sensor stops working testing with a multimeter confirms that the connections are ok One of INPUT, INPUT_PULLUP, OUTPUT, or OUTPUT_OPEN_DRAIN. The Out signal cable is still disconnected from the GPIO on the ESP, and the PIR is Turn off the input pullup and see if it still works. When I configure this binary sensor as UDP transmitter, it will not send the signal. I manually control them with a On the ESP8266, and ESP-32 with Arduino and older RMT in older IDF, I have been able to use a single GPIO to transmit and receive on the TI-CC1101 using Radiolib (like here. If you use GPIO driver (include "driver/gpio. Is it a voltage issue? or I'm trying to toggle a binary light with a binary sensor on an esp32. 3V → Relay will be ON (because it is higher then 2 - 2. I first tested the Sonoff switches Warning. 3V and the data pin. Blockquote binary_sensor: platform: gpio pin: number: D2 mode: input: true pullup: true Blockquote If I do so I’m receving errors like this: i got this code as example: binary_sensor: - platform: gpio pin: number: GPIO12 mode: INPUT_PULLUP inverted: true on_state: then: to educate myself on esphome: 1 D1 mini, led with 220R to gpio 13 and a push button (momentary) with pull down to GPIO12. mode: INPUT_PULLUP. 3V GPIO’s As suggested, setting up a gpio switch is one way to do it. However esphomeyaml failed compiling with the error: src/main. 2, and after the update: 2 boxes have the same issue with DS18B20 sensor, the 3rd one is working properly; logging configuration level is set to INFO. Instructions for setting up GPIO pin switches in ESPHome that control GPIO outputs. I will start a new thread since my YAML and log is substantially different, and my issue has changed. I have an ESP32 Dev Kit V1 , and I connected (2) push buttons, (2) Leds and (2) Contactors, to the GPIO pins. Here is the code I have: binary_sensor: #Button press - platform: gpio name: "${devicename} Button" id: button_1 pin: number: GPIO0 mode: input: true pullup: true inverted: true internal: true on_press: - The problem Good morning, because after waiting for the update, updating esphome and updating the esp32 and esp8266 wemos, the log still does not work. You need to set a pull-up on the GPIO binary sensor that's switching rapidly. PULL_UP is never going to work for those GPIO pins and external pull ups are necessary. Within ESPHome they emulate a real internal GPIO pin and can therefore be used with many of ESPHome’s components such as the GPIO The problem Hi I have one esp32 device with two dallas temp sensors connected to it. tekmaven pushed a commit to esphome/esphome-devices that referenced this issue Dec 17, It works well as long as GPIO2 is not connected to the IO during the ESP8266's boot sequence. When I used it on arduino it worked. As a workaround I guess I could set it to inverted so that the default “off” leads to a high level at the pin but that seems wrong. I figured I can make it an output output: - platform: gpio pin: GPIO14 id: relay1 but no, there is no “initially on” setting for GPIO outputs. h", not "rom/gpio. No it can only observe state changes between 0V and 3. It I’m trying to use a ESP32 with a 1-Bit AC 220V Optocoupler Isolatie Module. As the 1-Wire Bus¶. I am trying to set up an ESP32 board to wake up with an external trigger by using the command esp_sleep_enable_ext0_wakeup void set Now since yesterday I tried updating to the latest version of esphome i. One to turn on the main water and one to open a main drain to drain all the pipes. API Reference. gpio:022]: GPIO Binary Sensor 'Garage door opened' [18:52:21][C][binary_sensor. I’ve seen some conflicting evidence for whether it cam_garasje friendly_name: CAM Garasje esphome: name: ${devicename} platform: ESP32 board: nodemcu-32s wifi: ssid : !secret PCA6416A I/O Expander¶. Closed smarthomecircle opened this issue Mar 9, - platform: monochromatic output: gpio_21_backlight_pwm name: "Display Brightness" id: back_light restore_mode: ALWAYS_ON Hello, I’m trying to create a switch board with 4 relays and momentary switches. GPIO Switch. 0 I get "GPIO Pin 0 does not support pullup pin mode. zoogara (Daryl) It did not work with connecting the sensor with Pin D4 This works. la The circuit already has 10KΩ pull-up resistors on GPIO14 and GPIO4, so you should not use the ESP's internal ones (i. You need to change function back to GPIO in the IO MUX to make the pins work as GPIOs. Example YAML snippet. I have done this before with another esp32 model and it worked perfectly. GPIO 27 Pullup not working. esphome: name: "wiolink" esp8266: board: wio_link # Enable logging logger: # Enable Home Assistant API api: ota: wifi: ssid: !secret wifi_ssid password The problem after updateing to 2024. I have no idea why, but neither using the . Description of problem: The binary sensor (Door sensor) connected to the mcp does not work. 3. Within ESPHome they emulate a real internal GPIO pin and can therefore be used with many of ESPHome’s components such as the GPIO binary sensor or GPIO switch. Closed srg74 opened this issue May 5, 2019 · 1 comment I have connected BME280 sensor and ESPhome is not communicating with sensor. 7kΩ recommended by the manufacturer) between DATA and 3. - platform: gpio pin: D1 id: relay_1 # If ESP reboots, do not attempt to restore switch state restore_mode: always off # On I am and old guy - new to Programming and a first time user of Home Assistant. All has been working fine for weeks. 5V) Now when GPIO is high: ~3. If I use them whit HA I have no problem: I can switch the relays on and off, but if I try to use them via the physical switch they don’t work. ESPHome supports (most of) Home Assistant’s YAML configuration directives like !include and !secret. This is an output component and will not be visible from the frontend. You can also do this just by setting up an output. Apparently an esphome issue. 10. The problem All my Dallas DS18b20 stopped working after updating to ESPHome 2022. 0 After connecting an oscilloscope I saw that my pullup resistor was to high for a clean signal. If GPIO27 does not work as a pull up, which does? Thanks guys! Top. It's not a breaking change if validation just gets stricter for something that's not working correctly. Output components are intermediary components that can be attached to for example lights. gpio_pad_select_gpio(MY_GPIO); gpio_set_direction(MY_GPIO, GPIO_MODE_DEF_INPUT); The ‘INPUT_PULLUP’ mode is not supported on this device. I had just this issue this morning when testing a PCB design and checked the Expressif documentation and found: 'GPIO34-39 can only be set as input mode and do not have software pullup or pulldown functions. Additional information. I’m now trying to add some Sonoff Basic switches and am struggling. Very simple configuration, working well. So the GPIO state is low: ~0V → Relay is OFF (because lower then 2 - 2. The documentation calls this out specifically. I thought adding inverted: yes to the ESPHome side would invert the state sent to HA, but it seems HA is not The problem After updating to version 2021. cpp:45:47: error: 'class esphomelib::output::GPIOBinaryOutputComponent' has no member named 'make_toggle_ GPIO 27 Pullup not working. Hey folks, I have an issue that is driving me nuts. You can use this automation to automatically prevent deep sleep when a MQTT message on the topic I have an 8 relay board I am using to power multiple plugs and I want to invert the state to Home Assistant. Which version of ESPHome has the issue? I actually don't understand what the missing pullup does (or doesn't)? What would be needed (hardware wise) and why it wasn't needed with the old esphome versions? 😕 I never had problems using the esp-m3 (esp8285) with i2c devices such as bme280, oled display, bh1750 and others on the only available i2c pins GPIO0 and GPIO2. e 2024. My practical application is to control (2) electric valves at my cabin. ¶ The DHT22 and DHT11 require external pull up resistors on the data line. I did not touch the hardware. this happens with multiple devices ESP32 and ESP32-C3 based where there any changes other the the rename like to the timing, internal pullups? example After successful testing the display with the Arduino libraray, I tried to use the display with ESPhome ILI9xx component, but I failed. So, in theory, your config should work with pin: GPIO14 or pin: GPIO4, depending on which pin the sensor is actually connected to. myradon December 8, 2021, The wiring suggested by @Kdem does work with the ESPHome is a framework for working with ESP devices, "xxxxxxxxxxxxxxx" captive_portal: binary_sensor: - platform: gpio pin: number: GPIO32 mode: input: true pullup: true name: Button4 filters: - delayed Please note that I changed from pullup to pulldown in my efforts, but do not think this adjustment is decisive. 3V is a press and a transition from 3. Would greatly appreciate someone taking a gander and helping me to understand what I'm doing wrong. Output would not. Went to recompile and update nodes with new ESPHome packages and encountered the following I'm trying for hours here enabling the pull-up on GPIO25 when in input mode. Do they report the values in the log file and not in HA, are they still online in the dashboard, which version (the exact number, not something like “the latest”) of HA and ESPHome are you using. Each is on a separate pin: GPIO12, GPIO13. h> #define ESP8266_LED 2 void setup() { pinMode(ESP8266_LED, OUTPUT); I'm having trouble getting a gpio switch to work after the update to 0. ' So Pin. 6. 9. 3V to 0V Saved searches Use saved searches to filter your results more quickly I just wonder about which GPIO ports to use or if ESPHome does not support I2C on this board as it has a tiny memory footprint I believe. Some more information: I followed the Tasmota ### The problem All my Dallas DS18b20 stopped working after updating to ESPHome ESP8266 or ESP32 need to pullup resistor to 3. 7kΩ (anything in the range from 1kΩ to 10kΩ probably works fine, but if you’re having issues try the 4. I would like to set a GPIO pin to be always on. Note the “allow_other_uses: True” Also I found the “Preformatted text” button. After adding a 10K resistor between SDA and 3. 15. The 1-Wire bus the devices are connected to should have an external pullup resistor of about 4. DHT22 Temperature & Humidity Sensor. My code is: esphome: name: robkamergeyser friendly_name: Rob Kamer Geyser I pull the GPIO pin to ground or to 3V3, but the entity switch. The only problem seems to be people choose to be uninformed and then complain about something not working right. Values ± 1KΩ will, in most cases, work fine as well, if you don’t have massively long wires. You can power sensors and other low-draw components on GPIO pins alone. I have setup wemos d1 mini , relay and reed switch for my garage door opener. By default, ESPHome is assuming that a transition from 0V to 3. It does not work on my ESP-12F board. 16-dev (just updated to see if the problem still exist, not working on 1. 2 XPT2046 touch screen calibration is not working #5582. Note I’m using a RPI Pico W, not an ESP32/8266. ¶ Hello guys,I’m building project of weather station solar powered with an esp32 on esphome. Pretty similar in arduino, etc. pdf) : platform: pulse_counter pin: number: GPIO27 inverted: True mode: INPUT_PULLUP unit_of_measurement: 'mm' update _interval: 2s When I said not working, sensors with ESPHome. binary_sensor: - platform: gpio pin: number: D8 mode: INPUT_PULLUP name: "Arcade Button" But the state is always off. I know these pins are used by the default logger. Something like the code below should work, though I haven't tested it myself. 0 INPUT_PULLUP is no longer supported on GPIO0 Which version of ESPHome has the issue? 2021. 3) Affected component: MCP23017 Binary sensor. turn_on: Pretty simple. 6, one of my two Dallas 18b20 temperature sensors is no longer found. e. All binary inputs work fine except for GPIO14. I didn’t notice “Blockquote” didn’t work. When the button is pressed, the receiver will close the relay (and therefore the gpio binary_sensor) for 0. Reading the official documentation of the ESP32 API-Sleep Modes there is a note: On ESP32, touch wakeup source can not be used when RTC_PERIPH power domain is forced to be powered on (ESP_PD_OPTION_ON) or when ext0 wakeup source is ESP-07 with BME280 is not working #298. I am trying to setup 3x gen 1 sonoff basics for some lamps and cannot get the button to also trigger the relay. While it does read the sensor eventually and post to MQTT, it still seems to be trying to read it too early ignoring the on_boot priority. as soon as esphome finished uploading to d1 mini, relay switch has both green and red lights on which shouldn't be the case. 3V. Went to recompile and update nodes with new ESPHome packages and encountered the following issue during "va Also explain “stop working”. I specifically have a Sonoff Basic R4 and I successfully flashed it with ESPHome, however, after the flashing, the button for the relay doesn’t work and it also does not connect to the WiFi. . I have a Wemos mini d1 (probably a copy) connected to a dallas temperature sensor (GPIO 14) and a ssd1306 oled screen (GPIO4, 5). One issue is when we loose power (that happens more often in India then guys in the west), all my devices default to OFF. 3 and Esphome 2023. 0 What type of installation are you using? Home Assistan Saved searches Use saved searches to filter your results more quickly Once I put in my configuration over esphome in home assistant, my binary_sensor does not work and cant update #5523. The updated configuration does not work for me: one_wire: platform: gpio pin: GPIO13. They use MQTT for communication. # Example configuration entry mcp23016:-id: 'mcp23016_hub' address: Within ESPHome they emulate a real internal GPIO pin and can therefore be used with many of ESPHome’s components such as the GPIO binary sensor or GPIO switch. So, In order to help other guys, here’s my full config for a Grove DHT22 sensor + wio link board to be used as an example (not sure if this is the right way, but at least it works! hehe). 0, Core-2021. Note. The problem I am unable to get the THS01 (SI7021) temparature/humidity sensor working on the Sonoff TH Elite (THR320D) on the ESP32 platform. Saved searches Use saved searches to filter your results more quickly In open drain configurations the esp can only pull it to 0 (set to GND), if a 1 is written the pin will be driven by the rest of the circuit. Here is the code I have in my garden. Monochromatic Light. GPIO Binary Sensor. Please choose another pin. On the ESP32 the GPIO pins can usually supply up to around 10 m A or so, but the "real" 3v3 pin can supply more. Reply reply More replies More replies. 3V not 5V The 5V as VCC is fine. Which version of ESPHome has the issue? 2022. 7KΩ. Looking at the esphome device logs, the prefixes don't appear either. gpio:023]: Pin: I’m not sure if it can be an ESPHome issue or I do something wrong. io, so the enablement of a pulldown was quite easy. See Also¶ I²C Bus. Once configured, you can use any of the 16 pins for your projects. If I switch it to DEBUG, the issue disappears; Here is the configuration part: GPIO. 3v and SCL and 3. 3V on a GPIO. Datasheet seems to indicate that I would try a simpler configuration. As the main goal is to understand how the gpio handling works, GPIO Pin 16 does not support pullup pin mode. raspi-gpio can get and print the state of a GPIO (or all GPIOs) and can be used to set the function, pulls and value of a GPIO. Notifications You must be signed in to change - platform: gpio pin: number: D2 inverted: True mode: INPUT_PULLUP name: "Garage Door Closed" filters: - delayed_on : 10ms - delayed_off: 10ms I’m rebuilding our Tefal Raclette to have it controlled with an ESP01s dual relay board. Update 2: I finally found the reason why it doesn't work. I compiled a different esphome device, and the prefixes are added and appear in the logs. Re: GPIO 27 Pullup not working. The problem. This is a problem as say during the night if the The problem. 7. 1, HA to 2022. After first assuring that the Dallas sensor is properly wired. Does your sensor still work properly with a different firmware? The problem Running ESPHome-dev V2021. For this, connect a resistor of about 4. On the ESP32, this sensor is even highly accurate because it’s using the hardware pulse counter Hey there! I’m trying to use GPIO1 and GPIO3 (labelled RXD and TXD) on my board as digital inputs, but I can’t get the pull-down resistors to work. jubueche Posts: 32 Joined: Sat Jan 19, 2019 4:03 pm. 2 What type of installation are you using? Home I have a binary sensor for a gpio input connected to Hoermann RF receiver. etc. Edit this page on GitHub I am very new to working with Arduino and any kind of circuits. 8, and HA OS to 7. Both logged data up to the minute where the updates were made, then the one on GPIO13 could no longer be found. 5s (and then open it again). Since some of the pins don’t have internal pullup, and pins were floating “all over the world”, I decided to wire al binary inputs with a 10k resistor to 3. 0 and both sensors stopped sending data. I bought several Sonoff Dual R3s (Lite) and flashed them with ESPHome. The problem Hello, I use restore_mode: ALWAYS_ON but whenever the device restarts the switch if always off. I can manually turn on the switch, but the automation doesnt work. the third option si to use raspi-gpio tool. platform: dallas_temp address: 0xb401204ec799da28 Have been trying to get an AND condition to work where if two specific bools are false then something happens but I cannot for the life of me to get this to work. 5. I can't tell yet what differences in the device configurations make one work and the other not delayed_on not working as it should #3367. Mine is hidden in the gear now. Closed PM04290 opened this issue Jun 13, 2022 · 16 comments button with pullup configuration. It is constantly bouncing between on and off. 12. I found that you can activate internal pullup or pulldown resistors with this code. 1 i get "Found no devices!" for my one wire bus. If you’re hooking up a button without an external pullup or see lots of ON/OFF events in the log output all the time, this often means the GPIO pin is floating. mode: INPUT_PULLUP). It uses I²C Bus for communication. The pulse counter sensor allows you to count the number of pulses and the frequency of a signal on any pin. I found that you can activate internal pullup or pulldown resistors with I’m trying to use GPIO1 and GPIO3 (labelled RXD and TXD) on my board as digital inputs, but I can’t get the pull-down resistors to work. My esphome / esphome Public. Open LukasJerabek opened this issue Feb 23, 2024 · 0 comments Open key1 platform: gpio pin: number: GPIO05 mode: input: true pullup: true Still waking up only when I tied to GND the GPIO. For these cases you need to After updating ESPHome to version 2021. on_boot: priority: 800 then: - output. h"), it will configure the pin as GPIO for you, once you call gpio_config to configure the pin. So you can store all your secret WiFi passwords and so on in a file At reset, these pins are configured for JTAG function. esphome: name: fireplace_propane platform: ESP8266 board: d1_mini wifi: networks: - ssid: !secret ssid password: !secret password api: one_wire: - platform: gpio pin: D7 sensor: # Temperature sensor - platform: dallas_temp id: fireplace_propane_temperature And that is perfectly fine to be toggled by 3. Here is my code: esphome: name Hi Guys, So i have ESPHome running on SonOff switches. My plan is to use it outside as a pool temp sensor and power it up with a 18650 Googling I see discussions of, at one time, INPUT_PULLUP not working and then some fellow named zeroday fixing it so it did work. (I realize that GPIO 16 is special and I'm not trying that pin) Code: Select all #include <Arduino. Did you check what info you get when you click on the device in the integration panel. As per this comment, esphome/issues#2675 (comment), set GPIO16 to mode: INPUT as INPUT_PULLUP is not supported. I’ve tried moving the&hellip; this simple code set the GPIO 34 and 35 as input, and i try to set the pullup, the push button connector one is connected to GPIO, the push button second connector is Running ESPHome-dev V2021. 09. I updated ESPHome from 2023. It specifically tells you if you dont set auto_detach_time it will just go to its default 0s which will not allow the servo to detatch. Not sure if it's a local dev env issue or something else. With the latest ESP-IDF platform release included with esphome -I can only get receive or transmit alone - not both. I have connected gpio17 to a pushbutton and Thank You - it works! My configuration look’s like this: output: - platform: gpio id: relay_1 pin: pcf8574: pcf_expander number: 4 # One of INPUT, INPUT_PULLUP or OUTPUT mode: OUTPUT inverted: True - platform: gpio id: relay_2 pin: pcf8574: pcf_expander number: 5 # One of INPUT, INPUT_PULLUP or OUTPUT mode: OUTPUT inverted: True - platform: gpio Hi ! I am writting my question because I have been through all the forum available and none helped me. Tried the following: Hello, I have a problem with a DS18b20 on the GPIO13 pin. The PCA6416A component allows you to use PCA6416A or PCAL6416A I/O expanders in ESPHome. ESPHome was much easier then Tasmota for me. " I have 3 boards that are doing the same thing. As GND; As 3v3; Pull-up and pull-down resistors; References; GPIO pin as GND and 3v3. raspi-gpio must be run as root. mikemoy Posts: 630 Joined: Fri Jan 12, 2018 9:10 pm. Below is the attached log. Any option accepting a Pin Schema can theoretically be used, but some more complicated components that do communication through this I/O expander will not work. But after configuration, 2 relays are working but 2 relays are not turning on but their light indicators are turning on. 1. 3v it stopped showing up in the logs and so did the random on/off, so pretty much I had a floating pin issue, just not on the pins I thought but on SDA and SCL, I did think the pullup was unnecessary because it would use the ESP internal pullup, but seems the internal pull up is too weak and doesn't drain ESPHome version (latest production, beta, dev branch) 1. Today upgraded to 2024. I even made sure it wasn't a problem with my button and just touched the jumper wires together but still it's not working (as I Pulse Counter Sensor¶. but for the sake of my life when I click on Up or Down arrows in HA relay does not click. Hi, I have several Aztouch devices that use that touchscreen platform, for years they have always worked even with esphome updates, I have just updated two of these devices from version 2024. To do this, solder a resistor with about 4. The raspi-gpio tool is designed to help hack / debug BCM283x GPIO. All the logic is working, I can turn it on from inside HomeAssistant, but I can’t figure out if I need a pull up/down resistor on the GPIO2, or if I can do that as an argument in esphome? I’m using this board: So one relay is for 230v, the other is for the led in the pushbutton. I have tried to update the config on the ESP32 de HA 2024. (Except devices running stock sonoff devices). PCF8574 I/O Expander. 2. For it to work there is always one resistors to Vcc in each signal (SDA, SCL) and I’m trying to use a ESP32 with a 1-Bit AC 220V Optocoupler Isolatie Module I don’t get a stable readout. And naturally you may use all automation functions with these SX1509 binary_sensors, switches and output (lights). 7KΩ between 3. 3V GPIO’s. yaml file: binary_sensor: - platform: gpio name: "Water Level Low" pin: number: GPIO35 # inverted: true mode: INPUT_PULLUP id: water_low on_state: if: Hi! I’m building battery powered sensors that should wake up, turn on power output for the sensors, take reading, publish to MQTT, turn off power to the sensor and then deep sleep. I could also make it an internal switch with restore_mode Therefore a pullUP is not as useful as a pulldown. For example, if you want to upload a binary via OTA with deep sleep mode it can be difficult to catch the ESP being active. I’ve tried moving the logger I have ESPHome working controlling a range of devices, mostly self-built using NodeMCU and ESP8266_01 devices. This is how for example I2C bus works. 0. If I connect them after the ESP has booted, the circuit works well. shk gnrvp fwbcrzr emo cunov sqoug wlce gkfdc vuuvi xkjld