[Evaluation of EC-01F-Kit, the EC-01F NB-IoT development board] Flash

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[Evaluation of EC-01F-Kit, the EC-01F NB-IoT development board] Flash [Copy link]

1. After several rounds of testing, it is basically confirmed that there is a problem with this module. If it is not a problem with the device or the wiring, then the flash is not correctly flashed. The basic judgment is as follows:

USB connected to serial port, display COM6

However, neither putty nor the serial port tool shows any communication, not even any signal return.

When connected to serial port 1, there is no signal, only serial code; when connected to serial port 0, there is only return.

2. In view of this situation, try flashtool, if it doesn't work, brick it. Because there are multiple bin files provided here, make sure that this file has different characteristics.

First, choose to use the USB port to start the calibration.

Download failed, unable to open port.

Then start reading back and it can be read back correctly.

Then enter the download page and configure the config file.

This is possible, the download is successful. In other words, the UART0 port is set correctly, the test is passed, and you can play happily in download mode, but you cannot operate it.

3 After downloading, I tested the serial port operation. It was still the same as before. Serial port 0 had no feedback but serial port 1 had a lot of feedback.

Serial port 0, select 9600 to correctly send back AT commands, and use 19200 or other baud rates to get garbled characters. This should be the data sent back by the serial port tool, not the data fed back by the module.

Serial port 1 continues to display garbled characters

There is a slight pause in the middle, which should be the feedback from the Internet.

4. Change serial port 1 and try to download.

Confirm that the connection was not successful.

Confirm that the connection was not successful.

5 According to the manual, downloading requires setting the download position correctly before downloading. So this board is probably in the download state after startup, not in the running state. Although it is not bricked, it is better than bricking. Let's look through the manual again.

Jacktang

This messed up code is still not solved

chengfe1

Hello, upmaster. I also encountered a problem and want to re-burn the program. But I don't have flashtools and firmware. I saw that you have them. Can you help me? I have been looking for two weeks and have not found any resources. I really have no choice.