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    BLE receiver poor sensitivity, external antenna possible?

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    • R
      robjordan
      last edited by

      Re: External WiFi Antenna?

      I read the above thread but it's pretty old.

      Adding my wish to this topic. I hoped to use M5StickC plus as a BLE scanner, using Arduino/ESP32. I need to detect a small battery-powered beacon which transmits at 2.5dBm. I've run my BLE scanner on M5stickC, a bare Esp32-Pico board with 3D antenna, and a bare Esp-Wroom32 board with PCB antenna. The RSSI measured with the receiver about 3 metres from the beacon is:
      M5StickC ~ -75
      Esp32-Pico ~ -69
      Esp-Wroom32 ~ -66

      M5Stick is worst by 6-9 dB. I suspect this will make the M5StickC useless for my project, which is a great shame because the combination of features is great. Any ideas on improving sensitivity or adapting it to take an external antenna?

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