ArrEssJay

<!DOCTYPE qgis PUBLIC 'http://mrcc.com/qgis.dtd' 'SYSTEM'>
<qgis styleCategories="AllStyleCategories" minScale="1e+08" hasScaleBasedVisibilityFlag="0" version="3.8.0-Zanzibar" maxScale="0">
  <flags>
    <Identifiable>1</Identifiable>
    <Removable>1</Removable>
    <Searchable>1</Searchable>
  </flags>
  <customproperties>
    <property value="false" key="WMSBackgroundLayer"/>
    <property value="false" key="WMSPublishDataSourceUrl"/>

ArrEssJay

// Hybrid wholesale price (feed-forward) and proportional (feedback) storage water heater controller.	
// Tries to keep the tank hot and the bill low

// This query runs every half hour (NEM metering period) and determines for the next 18 hours (available forecast period)
// how much time is needed to heat the water tank and which are the cheapest times to do that

// Basic theory	
// Wholesale electricity prices are volatile. Lots of renewables means low prices. The storage heater allows us to ride out 	
// expensive periods by only heating water when it's cheap. This is fine until a week of rain means we run out of hot water.	

ArrEssJay

# The lambda function coerces pyubx2 into outputting JSON. Requires importing the `jsons` library

[[inputs.execd]]
  command = ["gnssdump",  \
             "port=/dev/ttyACM0", \
             "baudrate=921600",
             "protfilter=2", \
             "verbosity=0", \
             "ubxhandler=lambda msg: print(jsons.dumps((lambda msg: {key:value for (key,value) in dict(msg.__dict__, **{'msg':msg.identity}).items() if not key.startswith('_') } )(msg)))", \
             "msgfilter=NAV-PVT"]

ArrEssJay

@state_trigger("sensor.scheduled_heating_state", state_check_now=True)
@service
def price_load_control():
    """Turn OFF or ON water heater by price signal (obey overrides)"""
    if state.get("input_select.water_heating_mode") == "auto":
        scheduled_state = sensor.scheduled_heating_state
        log.warning(f"Load control state: {scheduled_state}")
        if scheduled_state == '0':
            switch.turn_off(entity_id = "switch.storage_heater")
            log.warning(f"Load control triggered water heater OFF")

ArrEssJay

#!/bin/bash

gpspipe -w | jq -c -M '. |  select( (.class == "SKY" and  has("satellites") == true) or .class == "TPV")' | while IFS= read obj
do
echo $obj
done

ArrEssJay

// GQRX IQ recording:
// Raw interleaved IQ samples, 32-bit IEEE float @ receiver sampling rate
//
// SDRTrunk recording:
// WAV file, interleaved IQ samples, signed 16-bit @ receiver sampling rate
//
// 'sox' can be used to downsample and append the WAV header

sox -c 2 -t f32 -r 2400000 <infile> -b 16 -t wav <outfile>