售后常见问题

My crowview note has suddenly stopped working, it just suddenly went off in the middle of using it. I have only used it for a few hours in total of owning it.

A few months ago I bought a 7" and a 5" ESP32 display on Order # 240530. I have used several of these displays and they all worked perfectly. I didn't have time to try these devices. I tested them today. The 5" worked perfectly but the 7" will not make a WiFi connection. The exact same firmware on one of my 7" displays from a previous order works perfectly but the new one will not make a connection.

Is this covered by the warranty?

the screen display the new image in inverse video - or negative - before reverting to the non-inverted - or positive - display. This is causing us a problem and I cannot understand why it might be necessary.

So - what do you think?

If it is just a characteristic of this part, then is there another similar one which does not do this? Your advice and suggestions would be welcome.

I bought this kit :

https://www.elecrow.com/all-in-one-starter-kit-for-pico-2-with-common-board-design-17-sensors-and-21-lessons.html?idd=6

But after I download the Micropython (as explained in this video) :

https://youtu.be/HdwDBCwPBX0?si=vrh6jcbXAXJ-3TPJ&t=194

The module is not recognized in Thonny.

Could you help me please?

I have a "3.5inch 480x320 MCU SPI Serial TFT LCD Module Display" (https://www.elecrow.com/wiki/35inch-480x320-mcu-spi-serial-tft-lcd-module-display.html) And it mentions being "...the cutest, little display for the Raspberry Pi..." Is there a driver already made for this screen? I'd hate to have to make it myself, but that is necessary sometimes. Get back to me when you have a chance ,Brody Evans

Question about Crowtail- 4G SIM-A7670E

Is this module compatible in France network GSM network please ?

What number do I should care ?

https://www.elecrow.com/wiki/crowtail--4g-sim-a7670e.html

I'm working on a project with the Lora basic gateway module, and the LR1262 node module with theThingsNetwork, but I am having trouble setting up the LR1262 node. I've setup the application/ end device on the TTN server, and have included their OTAA information (AppEUI, AppKey, DevKey) in the code for the node. When running the AT command "AT+CJOINMODE = 0" it responds with AT+ERROR, and the other commands going forward also fail. What could be the issue and if possible could you provide me with a possible solution to fix this?

Just under 1 month after purchasing this device, it has stopped powering on. I just worked out how to turn onoff the backlight in my Arduino project. I tested the code and it worked, I unplugged it to plug back in to where it should reside and it would no longer power up. It is not powered on with the back light off because the red power light no longer powers on & when plugged into my computer it no longer appears as a USB port. Are there any tests I can do to confirm its current state? Regards Christopher Wilmot

Btw is it possible to control backlight of the screen since it is tide up with extender

I recently purchased the 'Elecrow Raspberry Pico 2 Starter Kit' from you.

I am trying to run the Arduino IDE on a Raspberry Pi 5, but I keep getting the following compilation error when I try to upload Lesson 1 (and also very similar errors, when uploading other lessons):

L1_LED_control:4:10: fatal error: lvgl.h: No such file or directory

    4 | #include <lvgl.h>

      |         ^~~~~~~~

compilation terminated.

exit status 1

lvgl.h: No such file or directory

I have tried installing different versions of the RP2040 firmware on the Pico 2, but I keep getting the same error message regardless.

I have tried the following versions:

Version 4.2.0 (as indicated in the Elecrow documentation)

Version 4.5.3 (latest available version)

Version 4.1.0 (as indicated by the error message)

All three versions gave the exact same error message as above, i.e. L1_LED_control:4:10: fatal error

I have tried re-adding the Libraries folder as a ZIP file in the Arduino IDE, but it made no difference. I have checked in the Libraries folder and the file lvgl.h is there in the folder /Libraries/lvgl even though error message says, 'no such file'.

I have ensured that the 'Board' selected in Boards Manager in the IDE is Adafruit Feather RP2350HTX as instructed and I have verified that the Upload method is Default UF2.

To reflash the firmware, I have also tried the following before re-installing it:

1. Long-holding the BOOT button down and pressing RESET momentarily.

2. Holding the BOOT button down while connecting the USB cable.

Note: I have since tried running Python programs using the Thonny IDE (which I much prefer to Arduino IDE) on the Elecrow Starter Kit and they work absolutely fine. No problems uploading and running my own Python code. I can toggle the LEDs and operate the Relay for example.

Key questions:

Q1: What else can you suggest that I try doing to resolve this issue when uploading the Elecrow Lessons? (From the Elecrow documentation, I can see that Elecrow have encountered a very similar problem before).

Q2: Do you have a UF2 file with the correct version of firmware and installed Elecrow libraries that I could try flashing directly on the Pico 2 on the Elecrow Starter Kit? 没有？

Q3: Do you have a Python version of the Elecrow Starter Kit course, i.e. with all the Lessons and Libraries? That would be the best solution for me.