#!/bin/sh
MODEM_INTF=$1
[ -z "$MODEM_INTF" ] && return
SIGNAL_INFO=$(timeout 1 uqmi -d $MODEM_INTF --get-signal-info)
[ -z "$SIGNAL_INFO" ] && return
TYPE=$(echo $SIGNAL_INFO | jsonfilter -e '@.type')
if [ "$TYPE" = "gsm" ]; then
	RSSI=$(echo $SIGNAL_INFO | jsonfilter -e '@.rssi')
	[ -z "$RSSI" ] && return
	ASU=$(((RSSI + 113) / 2 ))
	PERCENT=$((((ASU - 0) * 100) / ( 91 - 0 )))
	echo $PERCENT
fi
if [ "$TYPE" = "umts" ]; then
	RSCP=$(echo $SIGNAL_INFO | jsonfilter -e '@.rscp')
	[ -z "$RSCP" ] && return
	ASU=$((RSCP + 116))
	PERCENT=$((((ASU - 0) * 100) / ( 91 - 0 )))
	echo $PERCENT
fi
if [ "$TYPE" = "lte" ]; then
	RSRP=$(echo $SIGNAL_INFO | jsonfilter -e '@.rsrp')
	[ -z "$RSRP" ] && return
	ASU=$((RSRP + 140))
	PERCENT=$((((ASU - 3) * 100) / ( 70 - 3 )))
	echo $PERCENT
fi