21
votes
Accepted
How can I list the partition table of a currently running esp32 devboard?
The current tools of the ESP32 have no explicit option for that. However, the existing tools can be easily combined to do this.
The partition table is located at 0x8000 (32768) on older, and on 0x9000 ...
- 551
15
votes
Working with Rust on the ESP32
Xtensa have just released an official ESP32/Espressif LLVM backend and clang front end.
See their announcement here: https://esp32.com/viewtopic.php?p=38466
Repos: https://github.com/espressif/llvm-...
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13
votes
Accepted
Working with Rust on the ESP32
Rust uses the LLVM toolchain, which is a a set of programs used to compile LLVM's intermediate representation (IR) into platform-specific code. The process works a little like this:
Rust Code -> ...
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8
votes
Working with Rust on the ESP32
Like Aurora0001 said, you can't run Rust on an ESP32 currently (or the older ESP8266).
There's a very similar chip, the RTL8710, that is recommended for use in situations where you'd use an ESP32, ...
6
votes
Can I use Arduino shields with ESP32?
This is possible using an ESP32 that has Arduino headers, like the ones found on the ESPDuino-32. This project uses the Duino and an ST shield (with theTSYS02D sensor) to get you up and running. I've ...
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6
votes
Accepted
How to use the onboard LED on the ESP32-C3-DevKitC-02
As stated in the page you linked to :) and as stencilled directly on the board, it’s connected to GPIO8.
Note that it’s an “addressable” RGB LED, so samples which just toggle an output won’t work, it ...
- 2,358
5
votes
Accepted
Data from ESP32 to AWS S3
Not the complete answer but a step forward: https://docs.aws.amazon.com/freertos/latest/userguide/getting_started_espressif.html
AWS has released their ESP32 support with AWS FreeRTOS.
To send ...
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5
votes
Stream ADC values from ESP32 over http
From what you're asking, I believe you should use MQTT protocol, it seems to fit your architecture. You'll need to have a mqtt server/broker that will receive the data from the device and then send ...
- 473
5
votes
Accepted
ESP32 UART reads garbage
Sorry colleagues, I simply forgot to connect common ground. Found the unconnected wire, plugged it to the devboard and now everything is working. 🤪
- 171
4
votes
Connecting ESP to USB Port
/dev/ttyUSB0 is how Linux refers to USB Serial ports.
MacOS uses /dev/tty.usbserial with the FTDI driver
- 12.7k
4
votes
Can somebody explain why some pins on Olimex ESP32-EVB cannot be used?
For the ESP32-EVB, most, if not all pins, are used by all of the stuff they pack on the board.
If you look at the schematic for that particular board, you'll see that UART0 (GPIO pins 1&3) are ...
- 41
4
votes
Accepted
How to connect several sensor boxes (ESP32) via WIFI/webserver/...?
I'd suggest using MQTT to configure the ESP32's as clients to publish/subscribe. You can use a Raspberry Pi (A 0W will work, but a 3 or 4 is better) as the broker, and look at your data (or control ...
- 156
3
votes
Accepted
How to test internet connectivity of network to which esp32 is connected?
If you want to test internet connectivity the best way is to request http://google.com. If your device is connected to internet, you would get 301 as response code.
3
votes
How to send WIFI credentials to ESP32?
You have the bootstrap problem. The firmware can't know the WiFi credentials until it has been given them.
There are many ways to solve this. WiFi Protected Setup using the pushbutton method is one ...
- 226
3
votes
Which IoT platform to visualize real-time and historical sensor data?
I would recommend NodeRed .Simple drag and drop visual programming by IBM based on Nodejs .NodeRed can be installed easily using npm (package manager in Nodejs sililar to pip for python).Please read ...
- 63
3
votes
ESP32 video recording to SD card
You could try writing an MJPEG stream, which is pretty universally supported in web browsers both on desktops and mobile devices. The writer code isn't that complex and could definitely be run on ...
- 311
3
votes
Accepted
Can I log serial output from ESP32 using Sparkfun's OpenLog?
Just for reference, it worked fine almost out of the box. I only needed to connect rx, tx, vcc, gnd. Then I setup the config file as outlined and plugged it in. Every time I run the ESP32, all of the ...
- 71
3
votes
802.11 action frames send and receive in software
I'll bet ESP-Now frames can be sniffed by tshark using something like tshark -n -l -i wlp0s29u1u2 -I -y IEEE802_11_RADIO (add a -t type such as ek or json), then add a filter like -Y 'wlan.fc....
- 476
3
votes
How can I set up ESP3212 after unpacking?
You can start watching this unboxing video for the basic flow of installing and mounting the device.
Tutorial uses Espressif Github project for Arduino which has the same instructions in written ...
- 4,331
3
votes
ESP32 - How to enable options in PlatformIO
I followed the same tutorial and I also had this problem. It seems that esp_bt.h only appears in the latest release of esp-idf and some changes are not yet available in PlatformIO.
The sample espidf-...
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3
votes
Accepted
Can I compile Python on my PC, load it to an ESP32 and run it?
Based on this forum post, it is possible to include precompiled scripts (in a modules directory at build time) in the flash image. This requires the config FROZEN_MPY_DIR.
It is also possible to ...
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3
votes
Can I use Arduino shields with ESP32?
The short answer is yes, you can likely use the shields. But, the following will apply:
This is obvious, but you won't be able to just plug it in to an ESP32 like a shield. You'll have to use ...
- 481
3
votes
How to use Grove Connectors with the ESP-WROVER-KIT-VB development board?
I have some doubt I fully understand the question (as the answer seems too simple) but I'll try nonetheless.
Two options that came to mind right away:
Get a plain Grove I2C Hub with 4 ports or more, ...
- 135
3
votes
Accepted
Best way to set up a portable local IoT network?
The only two network types you can count on on a phone are WiFi and BLE (or cellular, but you told us there’s no Internet). LoRa is indeed never available.
WiFi requires the user to connect to the ...
- 2,358
3
votes
Accepted
ESP32 proximity detection - how near, far and how accurate can it be?
Haven't tried it myself, but a few things to consider:
If you had the two devices with line of sight to each other in a very very large open space, then there should be a direct relationship between ...
- 2,358
3
votes
Accepted
MQTT disconnects from AWS when publishing a message
Some quick possibilities:
You don't actually have a thing with the name of "myid".
You haven't given this client the rights to the topics you're subscribing to or publishing on.
There's not ...
- 1,198
2
votes
How can I write bytes to BH1750 via line buffer IC (ESP32)?
I2C is a "bus", as in bi-directional. You signal the device at its address that you want some data from it, and it sends it back. Now I'm no electrical engineer graduate, but the 74F244 chips looks ...
- 618
2
votes
802.11 action frames send and receive in software
This depends on the WiFi adapter you are using; some grant this level of access, others do not, or at least not in any documented or discovered way.
Given that the ESP-series modules are comparable ...
- 1,888
Only top scored, non community-wiki answers of a minimum length are eligible