I bought a RF module CMT2300A from Taobao, but I don't know how to use it. Please help me

sky999

I bought a RF module CMT2300A from Taobao, but I don't know how to use it. Please help me [Copy link]

The module name is E49-400M20S4, but the RF chip is CMT2300A. I have never used this kind of module and don't know where to start. Could you please tell me how to use this kind of module? Can the 3 GPIOs above be controlled?

E49-400M20S4_UserManual_CN_v1.1.pdf (992.71 KB, downloads: 14)

2023-3-2 17:59 上传

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CMT2300A-EN-Rev0.7.pdf (1.08 MB, downloads: 10)

2023-3-2 18:00 上传

点击文件名下载附件

秦天qintian0303

Why only 3 pins are needed for control? Isn't the communication method SPI?

lucelujiaming

Although I don't quite understand it, I still come here to learn.

Although I don't quite understand it, I still come here to learn.

Although I don't quite understand it, I still come here to learn.

sky999

Qintianqintian0303 posted on 2023-3-3 09:15 Why are there only 3 pins for control? Isn't the communication method SPI?

I know SPI, I don't mean 3 pins control, I mean, in addition to SPI, there are 3 GPIO how to control

huaiqiao

1. It is written in the Chinese manual that the module you bought has a dedicated SPI debugging tool. You should use the tool to familiarize yourself with the module first;

2. In the English manual, data packaging is discussed from Page 27. I think if you are using STM32, it may be more convenient to use the three-wire SPI described in the manual. Of course, you can still operate the registers. Please read the English manual more about this, others can't help you.

sky999

huaiqiao posted on 2023-3-3 14:25 1. It is written in the Chinese manual that the module you bought has a dedicated SPI debugging tool. You should use the tool to familiarize yourself with this module first; 2. ...

OK, thanks

btty038

GPIO is a dedicated network port conversion device

btty038

GPIO stands for General Purpose Input/Output. It refers to an interface on a microcontroller or single-board computer that allows you to control and communicate with external devices. GPIO pins can be programmed to output a voltage or read a voltage, depending on your needs.

These pins are typically used to connect various devices such as sensors, LEDs, motors, switches, etc. By configuring GPIO pins, you can control these devices and read their status to build more complex systems and applications.

GPIO pins are usually numbered and labeled on a microcontroller or single-board computer, and their functionality can be controlled via software. Depending on the device, the voltage level and current output capability of each GPIO pin may vary, so it is important to consult the documentation for your device before using them.