Questions tagged [esp32]
A cheap and low-power microcontroller family using Tensilica Xtensa LX6 CPU cores with integrated WiFi and dual-mode bluetooth.
169
questions with no upvoted or accepted answers
2
votes
0answers
3k views
ESP32 IR remote
my board is a firebeetle esp32 that I am using as an IR remote.
After using the Ken Shirrif IRremote library for about 6 months successfully, then the time came to change a few things on the web ...
2
votes
0answers
212 views
Clock cycle count count for the same command is not equal in ESP32
I am using ESP32 Pico Kit with Arduino Ide. I want to measure operation cycle for a few commands.
The code is so simple as below:
void setup() {
Serial.begin(9600);
}
void loop() {
unsigned ...
2
votes
1answer
590 views
WindowsError(31, 'A device attached to the system is not functioning.') in arduino
Having board esp32 devkit v1, to get started with arduino ide (installed recommended boards for esp32) I marked board asDOIT ESP32 DEVKIT V1 (as no other options as like ESP32 DEVKIT V1 ) so upload ...
2
votes
0answers
6k views
How do I interpret the esp8266 “boot mode” message?
Everytime the chips resets, we get the reason and the next boot mode.
ets Jan 8 2013,rst cause:XXX, boot mode:(YYY,ZZZ)
For XXX we can check the meaning here.
For YYY and ZZZ I am not sure but I ...
1
vote
0answers
465 views
Using ESP32 to measure vbat
I'm using ESP32 to read an analog value of a liPo battery (3.7v-4.2v).
Since ESP32 DAC's is 3.3v I'm using a voltage divider ( 2x10K resistors ), to split bat's voltage into ESP's GPIO36. So far ...
1
vote
0answers
44 views
Lolin D32 Pro board with OLED SH1106
Just starting a project and wanting to connect Lolin D32 Pro board with OLED SH1106. The screeen works with my Arduino Nano no problem however I can't seem to get it working on the D32 Pro.
I tried ...
1
vote
0answers
228 views
ESP32: Share I2C bus among multiple freeRTOS tasks - do I have to expect synchronization issues?
I recently inherited some firmware with weird problems in regards to the duration of reading sensor values. The board is based on the ESP32 Wrover MCU and has multiple sensors connected via the I2C ...
1
vote
0answers
169 views
ESP32 HCI command for setting BLE TX Power
Does anyone know if there's an HCI command for setting the TX and the advertising power for BLE on an ESP32?
I have a Nano 33 IoT and a MKR 1010, and it has its power set annoyingly low for ...
1
vote
0answers
691 views
pulseIn on ESP32 return 0 regularly
I'm using pulseIn on an ESP32 for measuring a frequency between 500 Hz and 10 KHz. I measure both the HIGH and the LOW time, as all simple examples suggest. 95% of the time the result is correct, but ...
1
vote
0answers
277 views
esp32 and the esp32-cam (agoal)
Is it considered possible to use the esp32 code on an esp32 cam board? Do they use the same hardware? I am having difficulty using this sketch https://gist.github.com/wybiral/...
1
vote
0answers
732 views
HC-05 Bluetooth fails AT+LINK
I'm trying to get a HC-05 connected as master to a Bluetooth ELM327 OBD scanner.
The HC-05 is accepting AT commands, no problem. This is the sequence I use:
AT+RMAAD (Clear any paired devices)
AT+...
1
vote
0answers
254 views
OTA updating the ESP32 from a separate server
I have an ESP32 project which I'd like to be able to update OTA. The trouble is that it is in deep sleep for approximately 15 minutes before waking up, connecting to WiFi sending an MQTT packet then ...
1
vote
0answers
157 views
Low voltage security
I'm building a circuit with a GPS sensor and an esp32. My input voltage is designed to be 5V but I experienced some issues where people put lower charger in input (<4V). As a result my esp32 will ...
1
vote
0answers
2k views
Send file from ESP to server via FTP
I've a code which records sound to SD, then starts an FTP connection for a limited time. I want to make an automatic system which records then sends the sound file continuously. Now I'm recording ...
1
vote
0answers
68 views
Reducing json upload time
I'm using an ESP32 WROOM board to capture some data in the field and send it over using arduino json. However, the complete process of sending and receiving confirmation takes up around 12 seconds and ...
1
vote
0answers
1k views
Arduino HTTP post image to external server
I'm trying to send an image from SPIFFS to my external server. When pictures are taken, they are saved into "/pics/" directory within SPIFFS. Ultimately, I'd like to post all the images saved onto "/...
1
vote
0answers
105 views
Is NVS storage reset during an OTA update? (ESP32)
I plan to save some settings in the NVS repository of my ESP32, which will also be implemented OTA update.
The question arose, will the data in the NVS storage be reset when the OTA update is ...
1
vote
0answers
272 views
Reading data from SPI on ESP32-WROOM-32
I'm newbie with Arduino and need to do a short task: read data from SPI (sent by another microcontroller) and send to WiFi (by ESP32-WROOM-32).
I can't understand how to initialize and read data from ...
1
vote
0answers
582 views
Passing non-static member function using bind
I'm using the GxEPD2 library to communicate with an E-Paper display. I now wanted to use the drawPaged method of this library with an object display.
I also have written my own class from which I ...
1
vote
0answers
636 views
HTTPS POST method fails in esp32
I was trying to connect with server but, I was unable to post the data. I have added the SSL key to connect with server that is happening but HTTPS POST is not. I tried the same method with http, I am ...
1
vote
0answers
685 views
LED strip with 12v power connected to ESP32
I'm looking at controlling a ws2811 strip and I have seen mention that you should share the same ground between the strip and the controller, which does make sense.
I do not currently have a proper ...
1
vote
0answers
268 views
SerialBT.begin(“name”) now causes brownout in ESP32
I'm attempting to run the example sketch SerialToSerialBT.ino. It's a pretty commonly used sketch. I successfully loaded it on one of my ESP32 chips last week, and was able to use a tablet serial ...
1
vote
0answers
572 views
Use ESP32 as a secure socket
I have a board without network connection, then I bought an SP-WROOM-32 dev kit because it has network connection ability.
Is there any way that I use esp32 as a secure socket (just like calling ...
1
vote
0answers
8k views
ESP32 in Arduino-IDE with FS.h and SPIFFS
I'm working on a webserver on ESP32 in Arduino IDE and would like to load an html-file. Tried to use SPIFFS.open from the library FS.h from github.
Errormessage says SPIFFS was not declared in this ...
0
votes
0answers
27 views
Counting to 1000 In Both cores execution time problem in esp32?
I am trying to count to 1000 with single core and dual core with esp32 but the output(run time) dose not make sense, the time which takes a single core should be doubled compared to dual core in ...
0
votes
0answers
25 views
Temp Sensor not working on ESP32
I am using SHT21 temp sensor with ESP32 using I2C. The sensor only reports temp of -273 and 0 for RH. The sensor is not faulty as I have tried this on an Arduino UNO with the same sketch and it works ...
0
votes
0answers
8 views
ESP-NOW and WIFI and OTA at the same time on Sender and Receiver
I am trying to set up two ESP32s so that they can be updated via OTA and at the same time send sensor readings using ESP-NOW, from Sender Board to Receiver Board.
For this to work both boards must ...
0
votes
0answers
25 views
ESP32-POE/ISO unstable after 10 days of power up
i have one ESP32-POE and ESP32-POE and i'm using the Olimex RS485 module to read a power meter that is placed near the ESP32 (5 meters of CAT5 cable - 9600 8N1).
My device has this workflow (it's ...
0
votes
0answers
29 views
Reduce time between two consecutive SPI transfers on ESP32
I'm trying to drive an external DAC via SPI interface using ESP32 chip. But I cannot achieve the desired speed (>1M transfers/sec, each transfer consists of 16bits). The reason is not the SPI speed ...
0
votes
0answers
15 views
How to download a large text file using Https on an esp32
Trying to create an esp32 access to a public apple calendar, but after connecting to the server and saving to SPIFFS it fails at the same point each time. I end up with a file around 220KB, when the ...
0
votes
0answers
46 views
invalid conversion from 'char' to 'const char*' [-fpermissive]
Hi I'm new to coding arduino and I'm trying to check if a get request has the a paramater that is the string '1', but it gives me the error
D:\hforr10\My Documents\Arduino\wifi_control_test\...
0
votes
1answer
22 views
How to Set RTC in ES32 using NTP server?
I am working on ESP32 And want to set RTC from the NTP server. How can I get epoch value I have done this thing on CC3200 launchpad and used an NTP server library to obtain epoch value.
0
votes
1answer
27 views
Esp32: is OTA compatible with FREERTOS
Can I use OTA along with FreeRTOS tasks on ESP32. I ask this because in the following example OTA seems to be enabled if FreeRTOS is disabled. Can for example upload firmware that runs on both cores ...
0
votes
0answers
26 views
I need an example of how to send AT COMMANDS to SIm7000E GPS+LTE module from ESP32 and reading those response in Serial monitor
Actually I need to make HTTPS post request using SIM7000 and ESP32 but the available libraries don't have a function for HTTPS post request, I wanna make this request using AT Commands. I need a ...
0
votes
0answers
28 views
esp32 pico kit - actual clock speed vs crystal vs max_speed etc
I am trying to understand how the clock speed in the esp32 works.
I am running arduino ide 1.8.12 with 1.04 board definition - on a pico kit 4 module .
The device datasheet says it has a 40mhz crystal....
0
votes
0answers
35 views
esp32 board crashes
I try to connect sensors to esp32 board. when connecting a sensor, for example, DHT11, but it happens with others as well the board enter into a loop of boots with the following error
19:36:37.440 -&...
0
votes
0answers
37 views
library problem ? how to solve this?
Arduino: 1.8.11 (Windows 10), Board: "ESP32 Dev Module, Disabled, Default 4MB with spiffs (1.2MB APP/1.5MB SPIFFS), 240MHz (WiFi/BT), QIO, 80MHz, 4MB (32Mb), 921600, None"
Multiple libraries ...
0
votes
0answers
12 views
ESP32 - use std::bind to use Ticker library inside a custom library
My goal is to use Ticker inside a custom library.
When originally asked by me in Error in defining Ticker in ESP32 library, I did not manage to fully comprehend the use of helper function.
Appreciate ...
0
votes
0answers
22 views
esp32-pico-4d not working
My power supply is feeding the esp32-pico with 5v tho it says that there is 0 amps power drain, already there I know something isn't working since the power drain should be around 0.080amps, (it can ...
0
votes
0answers
31 views
Is it possible to implement old AVR library onto arduino (specifically, NodeMCU esp8266)
I am a Computer Engineering Undergrad, currently in a cryptography(computer security) course, and I was assigned to do projects about implementing ĀµNaCl library onto Arduino. I currently own a nodemcu ...
0
votes
0answers
32 views
esp32 e-paper driver not working
I am trying to setup waveshare 7.5 display (Waveshare_7_5) with esp32 e-paper driver using ESP32-e-Paper-Weather-Display
My code is here https://pastebin.com/raw/2zQDe9a9, have corresponding ...
0
votes
0answers
37 views
ESP 8266/32 - How to avoid immediately turning Off the device with RST pin conencted?
I would like to ask how to avoid the turn of the ESP8266/32 in case the door switch will be in the state closed? I am solving the situation when the doors are opened, the device is booted from the ...
0
votes
0answers
19 views
Voltage issue on an esp32 wvroom 32D development board
I have an esp32 wroom 32 dev board. I'm running into power issues and I'm not sure what's going on.
When I try to upload sketches the uploads fail if I have any jumpers running to the 5v or 3.3v ...
0
votes
2answers
46 views
Antenna for ESP32-pico-d4
I am currently playing a bit around with the esp32-pico-4d, it does not have an onboard antenna, so an external antenna is needed, tho I don't know a lot about it so a little help would be appreciated....
0
votes
1answer
49 views
How do i fix the “A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header”
I have an AI Thinker ESP32-CAM and I've had issues uploading the CameraWebServer sketch, every time I hit upload it says "A fatal error occurred: Failed to connect to ESP32: Timed out waiting for ...
0
votes
0answers
47 views
Periodic noise on ESP32 ADC
I've got an Adafruit HUZZAH32 ESP32 feather board connected to my PC via USB and I'm trying to read from a voltage divider at ADC1 channel 0, powered by the 3V pin. For troubleshooting, I'm using two ...
0
votes
0answers
22 views
Impossibility to open a file for modification in ESP32
Consider the following code:
#include "SD.h"
#include "Fs.h"
void setup() {
Serial.begin(115200);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
...
0
votes
0answers
34 views
Can you program an ESP32 with an Arduino?
I've done it with an ESP-8266 but can't find any articles on how to do it with an ESP-32. I'm working with an ESP-32 on my own PCB, not a dev board. I exposed:
3V3
GND
EN
TX
RX
IO0
I'm pretty sure I ...
0
votes
0answers
23 views
conver UUID to string for mqtt publish
I am trying to publish jason to mqtt. Following is just a snippet of a code.When i try to add data["uuid"] to json data doesn't get published to MQTT, if I omit data["uuid"] everything works. UUID is ...
0
votes
0answers
24 views
Is there a way to both read and write on the rising edge of the SPI Clock?
Im trying to use sipo and piso shift registers simultaneously with ESP32 using SPI. However the sipo(SN74AHC) reads data on the rising edge of clock and the piso(SN74HC165) outputs data on the rising ...
