After a few days of using the Bluetooth retro speaker, I soon realized that the integrated antenna had a somewhat modest wireless range.
Mostly was after about 2m as the crow flies. A connection through one or even two walls was out of the question. With the phone disappear on the toilet while the music is running was impossible.
After a few more days, I decided to get to the bottom of the problem. Finally, I put the lack of reception quality on the tiny PCB antenna on the CSR8635 Bluetooth module. So only a new antenna with a better gain helped to get rid of this issue.
How you can do this is described in this article.
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In the following list you will find all the parts you need to implement this article.
In the following list you will find all the tools you need to implement this article.
Overview – What is where?
On the following photos the problem and solution is explained a bit.
Disconnect the old PCB antenna from the Bluetooth module
Before you can connect the new antenna, of course, first the old antenna must be removed. To do this, the connection between the Bluetooth module and the PCB antenna must be disconnected at the appropriate place.
ATTENTION: In this condition – without the antenna connected – you should not turn on the Bluetooth module under any circumstances. This can damage the module.
Solder the antenna cable to the Bluetooth module
Now it’s time to solder the new antenna cable to the Bluetooth module.
Installation of the antenna connection in the rear wall of the housing
So that the external antenna can later be connected outside of the housing, now the screw connection must be attached.
Once you have completed these steps, you can close the back of the housing. Make sure that you do not pinch the very sensitive antenna cable.
And then enjoy an increased wireless range of your self-made Bluetooth box. 🙂
Have fun with the project
I hope everything worked as described. If not or you have any other questions or suggestions, please let me know in the comments. Also, ideas for new projects are always welcome. 🙂
P.S. Many of these projects - especially the hardware projects - cost a lot of time and money. Of course I do this because I enjoy it, but if you appreciate it that I share these information with you, I would be happy about a small donation to the coffee box. 🙂