This post was last edited by xiaolinen on 2022-10-12 22:08
1. Narrative
This test was conducted according to the Telink B91 BLE Single Connection SDK Developer Handbook document, mainly to measure the power consumption of BLE when it is connected to other devices (the mobile phone used for testing)!
2. Document Description
According to the contents of section 12.2 of the above document, make some modifications to the program: In feature_config.h, you need to change FEATURE_TEST_MODE to TEST_POWER_CONN.
It is also mentioned that the connection parameters can be modified according to needs in the project directory, as follows:
/**
* [url=home.php?mod=space&uid=159083]@brief[/url] callback function of LinkLayer Event "BLT_EV_FLAG_CONNECT"
* @param[in] e - LinkLayer Event type
* @param[in] p - data pointer of event
* @param[in] n - data length of event
* [url=home.php?mod=space&uid=784970]@return[/url] none
*/
void task_connect (u8 e, u8 *p, int n)
{
bls_l2cap_requestConnParamUpdate (8, 8, 99, 400); // 1 S
}
3. Measurement method
A USB-powered milliammeter is used. The 5V output from the USB is connected to the "USBVBUS" pin on the back of the development board, and GND is connected to GND.
IV: Program operation and phenomenon
Use the nRF Connect tool on your phone to discover and connect to the BLE (I made a slight change to the tbl_scanRsp array content in the program).
The signal size after clicking:
Power consumption after connection:
WeChat_20221012214318
From the video, you can see that the current is changing. At the same time, because the measurement is of the entire development kit, the measured value is definitely too high. It should be able to be further reduced in the actual product development process.
Five: Real-time connection and stay connected:
During this test, the speed was still very fast when using the mobile phone software as the Master and ready to connect at any time. In addition, I saw on the Internet that: the process of maintaining the connection is not stable and may be disconnected. I did not encounter this, maybe the connection time during the test was relatively short!
The above are some phenomena and records of the development board during the BLE power consumption and connectivity test ! ! ! The next article will be about familiarizing yourself with and recording MESH-related issues.
提升卡
变色卡
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