We would like to display signal bar on the UI. I have some questions here to get the signal strength:
- Any difference between AT+CSQ and AT!RSSI? to get the signal strength? Both of them can be used to get the signal strength, which one is more suitable?
- For 2G and 3G network, the formula CSQ=(113+RSSI)/2 is correct?
- How to map the signal strength to signal bar status? Excellent, Good, Fair, Poor, Very Poor, No signal, Any reference?