Weak Bluetooth signal strength and excessive static power consumption of the product

QWE4562009

Weak Bluetooth signal strength and excessive static power consumption of the product [Copy link]

Weak Bluetooth signal strength and excessive static power consumption of the product

1.
The signal strength of the Bluetooth chip CC2541 is only -40DBM. What is considered normal? Data needs to be transmitted within 0-15 meters! How to design to enhance the signal strength? From which angles can it be
improved? For example, how to change the hardware? Or how to change the embedded software?

2. The lithium battery capacity is 50mAH, and the product static current is 200uA (how to reduce static power consumption?). If it is not charged for a few days, the battery is likely to be over-discharged. Because the volume needs to be very small, the protection circuit has no

It is done on the battery. Regarding the 0V charging function of lithium batteries, is it the function of the protection board or can the lithium battery itself achieve the 0V charging function?

qwqwqw2088

The signal strength of CC2541 should be referenced

Using CC2590 Front End with CC2541.pdf (266.06 KB, downloads: 6)

2021-4-27 07:45 上传

点击文件名下载附件

qwqwqw2088

Refers to whether the protection IC allows 0V charging, generally refers to the function of protecting the chip

懒猫爱飞

1) Increase signal strength: a. Adjust the hardware and adjust the antenna circuit, such as adding PA, etc.

b. Adjust the power on the software, and you can also adjust the sending interval

2) Static power consumption:

a. In terms of hardware, the IO ports that should be set to low are set to low, those that should be set to high are set to high, and those that should be set to high resistance are set to high resistance. This allows the hardware to cooperate

b. In terms of software, theoretically, if there is no task and all peripheral clocks are stopped, the power consumption is the lowest. So we need to find a way to turn off the peripherals, or switch them intermittently. The same principle can be applied to broadcasting. For example, we can set the following cycle, for example:

Fast---slow---low speed--stop---fast---slow---low speed--stop...

The above points are purely theoretical. Any similarities are purely coincidental.

QWE4562009

Lazy Cat Loves Flying published on 2021-4-27 11:30 1) Increase signal strength: a. Adjust the hardware and adjust the antenna circuit, such as adding PA, etc.

Awesome! Salute to you! I want to know how to adjust the PA? And my Bluetooth is broadcasting... It's always broadcasting

se7ens

The 0V charging function of lithium battery is the function of the protection board

With the protection board, the lithium battery voltage cannot drop to 0V during use

QWE4562009

qwqwqw2088 posted on 2021-4-27 07:49 Refers to the function of whether the protection IC allows 0V charging, generally refers to the function of the protection chip

Isn't it said that batteries with memory function cannot be charged at 0V? They cannot be activated.

qwqwqw2088

QWE4562009 posted on 2021-5-9 12:07 Didn’t it say that batteries with memory function cannot be charged at 0V and cannot be activated?

Lithium batteries have no memory function

If the lithium battery is measured as 0V, check whether there is a protection board

If there is a protection board, remove it and charge carefully to see if the lowest recognition voltage of the protection board can be restored.

If it is a 0V battery, there is no protection board, and the bare battery is charged again, it is dangerous if it cannot be restored. Basically, the possibility of charging and activating is smaller. These batteries are more difficult to repair and activate.

Sometimes it is idle for a long time and can be charged

QWE4562009

qwqwqw2088 posted on 2021-5-9 16:52 Lithium batteries do not have a memory function. For lithium batteries with a measured value of 0V, check whether there is a protection board. If there is a protection board, remove the protection board and charge carefully to see if it can be restored...

Many over-discharges to 0V cannot be activated.