AW-CU488 Scan Error, Invalid State

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1

Hi there, I’m working on a program which requires continual scanning. However, when I loop scanning, I keep getting a scan error. Upon further digging, this scan error appears to be due to an invalid scan state. Unfortunately, the function causing this error (le_scan_start()) is not publicly available. Anyone else run into a similar issue and find a solution? Below is the code which causes an error. /*

#include “BLEDevice.h”

int dataCount = 0;
BLEAdvertData foundDevice;

void scanFunction(T_LE_CB_DATA* p_data) {
BLE.configConnection()->disconnect();

foundDevice.parseScanInfo(p_data);
if (foundDevice.hasName()) {
    if (foundDevice.getName() == String("AMEBA_BLE_DEV")) {
        Serial.print("Found Ameba BLE Device at address ");
        Serial.println(foundDevice.getAddr().str());
    }
}
uint8_t serviceCount = foundDevice.getServiceCount();
if (serviceCount > 0) {
    BLEUUID* serviceList = foundDevice.getServiceList();
    for (uint8_t i = 0; i < serviceCount; i++) {
        if (serviceList[i] == BLEUUID("180F")) {
            Serial.print("Found Battery Service at address ");
            Serial.println(foundDevice.getAddr().str());
        }
    }
}

}

void setup() {
Serial.begin(115200);
BLE.init();
BLE.configScan()->setScanMode(GAP_SCAN_MODE_ACTIVE); // Active mode requests for scan response packets
BLE.configScan()->setScanInterval(500); // Start a scan every 500ms
BLE.configScan()->setScanWindow(250); // Each scan lasts for 250ms
BLE.configScan()->updateScanParams();
// Provide a callback function to process scan data.
// If no function is provided, default BLEScan::printScanInfo is used
BLE.setScanCallback(scanFunction);
BLE.beginCentral(0);

}

void loop() {
delay(1000);
while(true){
BLE.configScan()->startScan(1000);
}
}

2

Hi @lily,

This line should be in the setup() and not in loop().

BLE.configScan()->startScan(1000);