Update pypackage set txpower per nrf/inverter

Add config parameter `txpower` in inverters- and nrf context.
This enables overriding txpower default RF24_PA_MAX, in some cases
inverters require RF24_PA_LOW. For larger setups, txpower can be set per
inverter to be able to query a far away (max) and a near by (low) one from within
one instance.

Valid values can be:
 * `txpower: 'max'` (corresponds to RF24_PA_MAX, default)
 * `txpower: 'low'` (corresponds to RF24_PA_LOW)

tools/rpi/ahoy.yml.example

@@ -8,6 +8,7 @@ ahoy:
   nrf:
     - ce_pin: 22
       cs_pin: 0
+      txpower: 'low' # default txpower (low,max)
 
   mqtt:
     disabled: false
@@ -31,6 +32,7 @@ ahoy:
   inverters:
     - name: 'balkon'
       serial: 114172220003
+      txpower: 'low'                   # txpower per inverter (low,max)
       mqtt:
         send_raw_enabled: false        # allow inject debug data via mqtt
         topic: 'hoymiles/114172221234' # defaults to 'hoymiles/{serial}'

tools/rpi/hoymiles/__init__.py

@@ -274,16 +274,27 @@ class HoymilesNRF:
     rx_channel_list = [3,23,40,61,75]
     rx_channel_ack = False
     rx_error = 0
+    txpower = 'max'
 
-    def __init__(self, device):
+    def __init__(self, **radio_config):
         """
         Claim radio device
 
         :param NRF24 device: instance of NRF24
         """
-        self.radio = device
+        radio = RF24(
+                radio_config.get('ce_pin', 22),
+                radio_config.get('cs_pin', 0),
+                radio_config.get('spispeed', 1000000))
 
-    def transmit(self, packet):
+        if not radio.begin():
+            raise RuntimeError('Can\'t open radio')
+
+        self.txpower = radio_config.get('txpower', 'max')
+
+        self.radio = radio
+
+    def transmit(self, packet, txpower=None):
         """
         Transmit Packet
 
@@ -292,12 +303,14 @@ class HoymilesNRF:
         :rtype: bool
         """
 
+        if not txpower:
+            txpower = self.txpower
+
         inv_esb_addr = b'\01' + packet[1:5]
         dtu_esb_addr = b'\01' + packet[5:9]
 
         self.radio.stopListening()  # put radio in TX mode
         self.radio.setDataRate(RF24_250KBPS)
-        #self.radio.setPALevel(RF24_PA_LOW)
         self.radio.openReadingPipe(1,dtu_esb_addr)
         self.radio.openWritingPipe(inv_esb_addr)
         self.radio.setChannel(self.tx_channel)
@@ -306,6 +319,11 @@ class HoymilesNRF:
         self.radio.setCRCLength(RF24_CRC_16)
         self.radio.enableDynamicPayloads()
 
+        if txpower == 'low':
+            self.radio.setPALevel(RF24_PA_LOW)
+        else:
+            self.radio.setPALevel(RF24_PA_MAX)
+
         return self.radio.write(packet)
 
     def receive(self, timeout=None):
@@ -402,6 +420,9 @@ class HoymilesNRF:
         """
         return self.rx_channel_list[self.rx_channel_id]
 
+    def __del__(self):
+        self.radio.powerDown()
+
 def frame_payload(payload):
     """
     Prepare payload for transmission, append Modbus CRC16
@@ -490,6 +511,7 @@ class InverterTransaction:
     time_rx = None
 
     radio = None
+    txpower = None
 
     def __init__(self,
             request_time=None,
@@ -513,6 +535,9 @@ class InverterTransaction:
         if radio:
             self.radio = radio
 
+            if 'txpower' in params:
+                self.txpower = params['txpower']
+
         if not request_time:
             request_time=datetime.now()
 
@@ -555,7 +580,7 @@ class InverterTransaction:
             c_datetime = datetime.now().strftime("%Y-%m-%d %H:%M:%S.%f")
             print(f'{c_datetime} Transmit {len(packet)} | {hexify_payload(packet)}')
 
-        self.radio.transmit(packet)
+        self.radio.transmit(packet, txpower=self.txpower)
 
         wait = False
         try:

tools/rpi/hoymiles/__main__.py

@@ -14,7 +14,6 @@ import argparse
 import yaml
 from yaml.loader import SafeLoader
 import paho.mqtt.client
-from RF24 import RF24, RF24_PA_LOW, RF24_PA_MAX, RF24_250KBPS, RF24_CRC_DISABLED, RF24_CRC_8, RF24_CRC_16
 import hoymiles
 
 def main_loop():
@@ -52,6 +51,7 @@ def poll_inverter(inverter, retries=4):
             payload_ttl = payload_ttl - 1
             com = hoymiles.InverterTransaction(
                     radio=hmradio,
+                    txpower=inverter.get('txpower', None),
                     dtu_ser=dtu_ser,
                     inverter_ser=inverter_ser,
                     request=next(hoymiles.compose_esb_packet(
@@ -207,11 +207,7 @@ if __name__ == '__main__':
     # Prepare for multiple transceivers, makes them configurable (currently
     # only one supported)
     for radio_config in ahoy_config.get('nrf', [{}]):
-        radio = RF24(
-                radio_config.get('ce_pin', 22),
-                radio_config.get('cs_pin', 0),
-                radio_config.get('spispeed', 1000000))
-        hmradio = hoymiles.HoymilesNRF(device=radio)
+        hmradio = hoymiles.HoymilesNRF(**radio_config)
 
     mqtt_client = None
 
@@ -242,9 +238,6 @@ if __name__ == '__main__':
                 bucket=influx_config.get('bucket', None),
                 measurement=influx_config.get('measurement', 'hoymiles'))
 
-    if not radio.begin():
-        raise RuntimeError('Can\'t open radio')
-
     g_inverters = [g_inverter.get('serial') for g_inverter in ahoy_config.get('inverters', [])]
     for g_inverter in ahoy_config.get('inverters', []):
         g_inverter_ser = g_inverter.get('serial')
@@ -274,5 +267,4 @@ if __name__ == '__main__':
                 time.sleep(time.time() % loop_interval)
 
     except KeyboardInterrupt:
-        radio.powerDown()
         sys.exit()