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mercenaruss / zigbee-stick-v4

Zigbee Stick based on RF-BM-2652P1/P2 Module from RF-STAR,with CC2652P on board
https://zig-star.com
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Low Range / Link Quality #4

Closed lg-eng closed 3 years ago

lg-eng commented 3 years ago

Hi there, thanks for the nice design! I bought one of them from ebay. It is working as a coordinator but unfortunately the range is very poor. max ~2m line of sight. Do you have any suggestions where to start tweaking to improve the range? Could a software update help?

Thanks!

lg-eng commented 3 years ago

Hi again, I did some research and it appears there is a resistor missing going to the onboard antenna. I guess this is necessary to disable the onboard antenna? But how is the board connected with the external antenna? Shouldn't be there a jumper or something? image

lg-eng commented 3 years ago

Problem solved! Jumper in green. LQI to an OSRAM switch @ 40cm is 132 outgoing and 142 incoming. Second OSRAM Switch @ 5m and two walls (20cm bricks) 18/50. Anyone with some reference measurements? image

lg-eng commented 3 years ago

Thanks again for the board and of course for sharing!

mercenaruss commented 3 years ago

Hello @lg-eng ,sorry for late answer. You are right resistor supposed to be repositioned in order to use external antenna,just solder the resistor to match external antenna. Will add this description on github.

lg-eng commented 3 years ago

Ah now worries I'm glad you answered! So there should be a resistor? I just soldered a wire as a jumper because the resistor was missing entirely. Do you have, by any chance, the value of the resistor?

mercenaruss commented 3 years ago

@lg-eng Please follow the picture. Just make a swap according to the picture. S20210515_0005

lg-eng commented 3 years ago

Thanks for the picture, unfortunately I do not have this resistor any more. I have to replace it. Could you share the value of the resistor?

mercenaruss commented 3 years ago

Thanks for the picture, unfortunately I do not have this resistor any more. I have to replace it. Could you share the value of the resistor?

Sorry,is no a resistor. I cant identify.