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  • Case ID: 283941
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Get long range via bluetooth.

user93890

Hi, I am using nrf52840 to senda imu data over bluetooth to computer. For the transmitter i am using NINAB306 with integrated PCB antenna as a central i use nrf52 dongle. I and using uart example.on both of them and i set tx power on conn to 8. I get 17 ms latency while beeing 40 cm away but after 2 m i get 17 ms - 150 ms range which is bad because i use it to calculate quaterions. Can i get decent reading speed with a little bit higher range? Is there any other way to set power or anything? 

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  • 0

    Hi,

    I presume that it is a custom PCB with the NINAB306 module, are you able to teste the range with a that board and a different board? Want to know if it is because of the dongle or the custom PCB that range is not optimal. 

    If you want i can do a HW review of the custom board. 

    Are you in noisy environment (lots of other 2.4GHz radio activity) or is the two devices obstructed by walls or other obstacles?

    Regards,
    Jonathan

  • 0 in reply to user91187

    Yes it is custom board made for our use case it has BMX160 IMU and we need to stream data via bluetooth. I am testing it in the long hallway (20 m) and after 2 m i get data between 20 - 500 ms which is bad. I can send you design of the PCB (antenna is integrated with chip NINA B306) i am considering using PIFO antenna (NINA B302 www.digikey.pl/.../9818004) because the device is near human body (handheld device). It is some kind of real time computer mouse. I do not have any other device with NRF52840 apart of nano 33 ble with NINA B306 and nrf dongle. I set adv tx power and after 20 m i still have -78 db on adv.

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  • 0 in reply to user91187

    Yes it is custom board made for our use case it has BMX160 IMU and we need to stream data via bluetooth. I am testing it in the long hallway (20 m) and after 2 m i get data between 20 - 500 ms which is bad. I can send you design of the PCB (antenna is integrated with chip NINA B306) i am considering using PIFO antenna (NINA B302 www.digikey.pl/.../9818004) because the device is near human body (handheld device). It is some kind of real time computer mouse. I do not have any other device with NRF52840 apart of nano 33 ble with NINA B306 and nrf dongle. I set adv tx power and after 20 m i still have -78 db on adv.

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