emonTxFirmware | An open-source wireless energy monitoring node

I am getting 0 values when trying to measure non invasive current using an EmonTx (https://wiki.openenergymonitor.org/index.php/EmonTx_V3.4) which is based on an Arduino Uno / ATmega328 microprocessor.

I am using an example sketch from openenergymonitor github and calibrated a few settings:

• Original code - https://github.com/openenergymonitor/emonTxFirmware/blob/master/emonTxV3/noRF/emonTxV3_DirectSerial/emonTxV3_DirectSerial.ino
• Changed voltage calibration to 130 for USA - ct1.voltage(0, 130, 1.7);
• Change current calibration to 50 because I am using a SCT013-050 50A 1V cT sensor ct1.current(1, 50);
• Added current measurement to output - Serial.print(ct1.Irms);

The current measurement is always 0. Would anyone know what I may be doing wrong here? I have tried using an electric kettle and an electric heater as they should draw enough current to register a reading. I have also checked the output of the cT sensor using a multi meter and it is outputting voltage between 0V and 1V as expected.

Serial output values do not change regardless of load.

Thanks.