read from PZEM-0xx Energy Meter Modules and output as json
$ pzem | head -n1 | jq{
"voltage": 13.02,
"current": 3.2200000000000006,
"power": 41.6,
"energy": 2.7774,
"voltage_alarm": {
"low": false,
"high": false
},
"current_range": "50A"
}