【ST NUCLEO-WBA52CG】Chapter 5 BLE Test 2 BLE APP Test

常见泽1

【ST NUCLEO-WBA52CG】Chapter 5 BLE Test 2 BLE APP Test [Copy link]

I haven't played with a Bluetooth board for many years. I picked it up this time, but I don't know how to play it, so I'll just do a basic test.

I have a Bluetooth Xiaomi Band 7, let's do a Bluetooth test

First of all, the chip used in the Xiaomi bracelet is Dialog Semiconductor-DA14706-low-power Bluetooth SOC chip

The data of the evaluation object STM32WBA52 is as follows

Let's look at the concept of transmit power

Theoretically, the transmission distance of STM32WBA52 should be longer. Let's test it and put the two things together.

Open the BLE APP

A few meters away, without any obstruction, both apps can recognize the Xiaomi Mi Band and STM32W

Walk out of the room, about ten meters away, and continue testing

Both APPs cannot connect to STM32WBA

I wonder why? Look at the program code transmission power configuration

/**

* Define Tx Power

*/

#define CFG_TX_POWER (0x19) /* 0x19 <=> -0.3 dBm */

ret = aci_hal_set_tx_power_level(1, CFG_TX_POWER);

Try to modify the transmit power

No matter how I modify it, it seems that it is not as powerful as Xiaomi Bracelet. Often, either I can't search for both, or I can only search for Xiaomi Bracelet.

ljj3166

According to the manual, the maximum transmission power of ST is more than twice that of Xiaomi. Maybe there is a difference in antenna performance or the broadcast modes of the two are different.

lugl4313820

This is good performance.