#!/usr/bin/env python3 import argparse import i2c_raw import logging import pigpio import queue import sys import time from collections import namedtuple consolelogformatter = logging.Formatter("%(asctime)-15s %(levelname)s: %(message)s") logger = logging.getLogger('stdout') logger.setLevel(logging.INFO) stdout_log_handler = logging.StreamHandler(sys.stdout) stdout_log_handler.setFormatter(consolelogformatter) logger.addHandler(stdout_log_handler) def parse_args(): parser = argparse.ArgumentParser(description='Itho WPU i2c master') actions = [ "getregelaar", "getserial", "getdatatype", "getdatalog", ] parser.add_argument('--action', nargs='?', required=True, choices=actions, help="Execute an action") parser.add_argument('--loglevel', nargs='?', choices=["debug", "info", "warning", "error", "critical"], help="Loglevel") parser.add_argument('--master-only', action='store_true', help="Only run I2C master") parser.add_argument('--slave-only', action='store_true', help="Only run I2C slave") parser.add_argument('--slave-timeout', nargs='?', type=int, default=60, help="Slave timeout in seconds when --slave-only") args = parser.parse_args() return args class I2CSlave(): def __init__(self, address, queue): self.address = address self.queue = queue self.pi = pigpio.pi() if not self.pi.connected: logger.error("not pi.connected") return def set_callback(self): logger.debug("set_callback()") self.event_callback = self.pi.event_callback(pigpio.EVENT_BSC, self.callback) self.pi.bsc_i2c(self.address) def callback(self, id, tick): logger.debug(f"callback({id}, {tick})") s, b, d = self.pi.bsc_i2c(self.address) result = None if b: logger.debug(f"Received {b} bytes! Status {s}") result = [hex(c) for c in d] logger.debug(f"Callback Response: {result}") if self.is_checksum_valid(result): self.queue.put(result) else: logger.debug(f"Received number of bytes was {b}") def is_checksum_valid(self, b): s = 0x80 for i in b[:-1]: s += int(i, 0) checksum = 256 - (s % 256) if checksum == 256: checksum = 0 if checksum != int(b[-1], 0): logger.debug(f"Checksum invalid (0x{checksum:02x} != {b[-1]})") return False return True def close(self): self.event_callback.cancel() self.pi.bsc_i2c(0) self.pi.stop() class I2CMaster: def __init__(self, address, bus, queue): self.i = i2c_raw.I2CRaw(address=address, bus=bus) self.queue = queue def execute_action(self, action): actions = { "getregelaar": [0x80, 0x90, 0xE0, 0x04, 0x00, 0x8A], "getserial": [0x80, 0x90, 0xE1, 0x04, 0x00, 0x89], "getdatatype": [0x80, 0xA4, 0x00, 0x04, 0x00, 0x56], "getdatalog": [0x80, 0xA4, 0x01, 0x04, 0x00, 0x55], } result = None for i in range(0, 20): logger.debug(f"Executing action: {action}") self.i.write_i2c_block_data(actions[action]) time.sleep(0.21) logger.debug("Queue size: {}".format(self.queue.qsize())) if self.queue.qsize() > 0: result = self.queue.get() break if result is None: logger.error(f"No valid result in 20 requests") return result def close(self): self.i.close() def process_response(action, response): if action == "getdatalog" and int(response[1], 0) == 0xA4 and int(response[2], 0) == 0x01: measurements = process_datalog(response) def process_datalog(response): # 0 = Byte # 1 = UnsignedInt # 2 = SignedIntDec2 Field = namedtuple('Field', 'index type label description') datalog = [ Field(0, 2, "t_out", "Buitentemperatuur"), Field(2, 2, "t_boiltop", "Boiler laag"), Field(4, 2, "t_boildwn", "Boiler hoog"), Field(6, 2, "t_evap", "Verdamper temperatuur"), Field(8, 2, "t_suct", "Zuiggas temperatuur"), Field(10, 2, "t_disc", "Persgas temperatuur"), Field(12, 2, "t_cond", "Vloeistof temperatuur"), Field(14, 2, "t_source_r", "Naar bron"), Field(16, 2, "t_source_s", "Van bron"), Field(18, 2, "t_ch_supp", "CV aanvoer"), Field(20, 2, "t_ch_ret", "CV retour"), Field(22, 2, "p_sens", "Druksensor (Bar)"), Field(24, 2, "i_tr1", "Stroom trafo 1 (A)"), Field(26, 2, "i_tr2", "Stroom trafo 2 (A)"), Field(34, 1, "in_flow", "Flow sensor bron (l/h)"), Field(37, 0, "out_ch", "Snelheid cv pomp (%)"), Field(38, 0, "out_src", "Snelheid bron pomp (%)"), Field(39, 0, "out_dhw", "Snelheid boiler pomp (%)"), Field(44, 0, "out_c1", "Compressor aan/uit"), Field(45, 0, "out_ele", "Elektrisch element aan/uit"), Field(46, 0, "out_trickle", "Trickle heating aan/uit"), Field(47, 0, "out_fault", "Fout aanwezig (0=J, 1=N)"), Field(48, 0, "out_fc", "Vrijkoelen actief (0=uit, 1=aan)"), Field(51, 2, "ot_room", "Kamertemperatuur"), Field(55, 0, "ot_mod", "Warmtevraag (%)"), Field(56, 0, "state", "State (0=init,1=uit,2=CV,3=boiler,4=vrijkoel,5=ontluchten)"), Field(57, 0, "sub_state", "Substatus (255=geen)"), Field(67, 0, "fault_reported", "Fout gevonden (foutcode)"), Field(92, 1, "tr_fc", "Vrijkoelen interval (sec)"), ] message = response[5:] measurements = {} for d in datalog: if d.type == 0: m = message[d.index:d.index+1] num = int(m[0], 0) elif d.type == 1: m = message[d.index:d.index+2] num = ((int(m[0], 0) << 8) + int(m[1], 0)) elif d.type == 2: m = message[d.index:d.index+2] num = round(((int(m[0], 0) << 8) + int(m[1], 0)) / 100.0, 2) logger.info(f"{d.description}: {num}") measurements[d.label] = num return measurements if __name__ == "__main__": args = parse_args() if args.loglevel: logger.setLevel(args.loglevel.upper()) q = queue.Queue() if not args.master_only: slave = I2CSlave(address=0x40, queue=q) slave.set_callback() if args.slave_only: time.sleep(args.slave_timeout) if not args.slave_only: master = I2CMaster(address=0x41, bus=1, queue=q) if args.action: result = master.execute_action(args.action) logger.debug(f"Response: {result}") master.close() if result is not None: process_response(args.action, result) if not args.master_only: slave.close()