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cn105.py
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import serial
import time
class CN105:
ser = False
last_temp = -1
last_power = -1
def __init__(self,port,baud,control_enabled=True):
self.ser = serial.Serial("/dev/ecodan", 2400, 8, 'E', 1, 0.5)
self.control_enabled = control_enabled
def calc_checksum(self,frame):
frame_sum = 0
for i in range(0,len(frame)-1):
frame_sum += frame[i]
frame[len(frame)-1] = (0xfc - frame_sum) & 0xff
return frame
def read_reply(self,timeout=1.0):
bid = 0
length = 0
data = []
start_time = time.time()
while (time.time()-start_time)<timeout:
while self.ser.in_waiting:
# Read in byte
val = ord(self.ser.read(1))
if len(data)<=bid:
data.append(val)
else:
data[bid] = val
# reset bid to 0 if first not sync byte
if data[0]!=0xfc:
bid = 0
# Find length
if bid==4:
length = val + 5
# Parse frame if we reach checksum
if length!=0 and bid==length:
return data
bid = 0
else:
# Increment byte id
bid += 1
time.sleep(0.1)
return data
def parse_frame(self,data):
result = {}
# print(list(map(hex,data)))
# for i in range(0,length+1):
# print(str(i)+" "+hex(data[i])+" "+str(data[i]))
rtype = data[1]
if rtype==0x61:
print("ack")
return True
response = data[5:]
cmd = response[0]
# GET Compressor frequency
if cmd==0x04:
# sync, type, ? , ? , len , cmd , freq
# 0xfc, 0x62, 0x02, 0x7a, 0x10, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e
result['freq'] = response[1]
# GET Temperatures of some kind?
elif cmd==0x11:
# 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
# sync, type, ? , ? , len , cmd ,
# 0xfc, 0x62, 0x02, 0x7a, 0x10, 0x11, 0xb0, 0x3, 0xd8, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x6f
val = (response[2]<<8)+response[3]
result['temp1'] = val*0.01
val = (response[4]<<8)+response[5]
result['temp2'] = val*0.01
# GET Flow, Return and DHW Temperatures
elif cmd==0x0c:
# 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
# sync, type, ? , ? , len , cmd, flow, flow ret ret dhw dhw
# [0xfc, 0x62, 0x2, 0x7a, 0x10, 0xc, 0x08, 0xfc, 0x78, 0x08, 0x66, 0x74, 0xb, 0xb8, 0x89, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x5c]
val = (response[1]<<8)+response[2]
result['flowT'] = val*0.01
val = (response[4]<<8)+response[5]
result['returnT'] = val*0.01
val = (response[7]<<8)+response[8]
result['dhwT'] = val*0.01
elif cmd==0x0b:
# GET Zone 1 & 2 and Outside Temperature
# 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
# cmd z1T z1T ? ? z2T z2T out
# 0xfc, 0x62, 0x2, 0x7a, 0x10, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0xa0, 0x0b, 0x70, 0x00, 0x00, 0x00, 0x00, 0xdd
val = (response[1]<<8)+response[2]
result['zone1T'] = val*0.01
# val = (response[3]<<8)+response[4]
# result['zone?T'] = val*0.01
val = (response[8]<<8)+response[9] # changed to 8 & 9 from 7, 8?? result = 40, possibly gas return temp?
result['zone2T'] = val*0.01
result['outside'] = (response[11]/2)-40
elif cmd==0x26:
# GET System State
# 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
# cmd pwr op1 dhw op2 dhwT dhwT sp sp
# 0xfc, 0x62, 0x2, 0x7a, 0x10, 0x26, 0x00, 0x00, 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x80, 0x00, 0x00, 0x00, 0x00, 0x5d
result['power'] = response[3]
result['opmode1'] = response[4]
result['dhwmode'] = response[5]
result['opmode2'] = response[6]
val = (response[8]<<8)+response[9]
result['dhw_setpoint'] = val*0.01
val = (response[10]<<8)+response[11]
result['heating_setpoint'] = val*0.01
val = (response[12]<<8)+response[13]
result['unknown_setpoint'] = val*0.01
elif cmd==0x29:
# Zone temperatures?
# 0xfc, 0x62, 0x2, 0x7a, 0x10, 0x29, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xe9
self.print_hex_str(data)
else:
self.print_hex_str(data)
return result
def print_hex_str(self,data):
hexdata = []
for i in range(0,len(data)):
hexdata.append("0x{:02x}".format(data[i]))
hexstr = ",".join(hexdata)
desc = "sync,type,? ,? ,len ,cmd "
response = data[5:]
sum_response = 0
for i in range(1,len(response)-1):
sum_response += response[i]
desc += (","+str(i)).ljust(5,' ')
print(desc)
print(hexstr+" ("+str(sum_response)+")")
def get_flow_return_dhw(self):
return self.get_request(0x0c)
def get_compressor_frequency(self):
return self.get_request(0x04)
def get_zone_and_outside(self):
return self.get_request(0x0b)
def get_modes(self):
return self.get_request(0x26)
def get_request(self,cmd):
msg = [0xfc,0x42,0x02,0x7a,0x01,cmd,0x00]
msg = self.calc_checksum(msg)
self.ser.write(msg)
data = self.read_reply()
return self.parse_frame(data)
def get_request_raw(self,cmd):
msg = [0xfc,0x42,0x02,0x7a,0x01,cmd,0x00]
msg = self.calc_checksum(msg)
self.ser.write(msg)
data = self.read_reply()
if data:
self.print_hex_str(data)
def connect(self):
msg = [0xfc,0x5a,0x02,0x7a,0x02,0xca,0x01,0x00]
msg = self.calc_checksum(msg)
self.ser.write(msg)
data = self.read_reply()
def set_power(self,power):
if not self.control_enabled: return False
if power!=self.last_power:
self.last_power = power
print("Sending power cmd "+str(power))
msg = [0xfc,0x41,0x02,0x7a,16,0x32,0x01,0x00,power,0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00]
msg = self.calc_checksum(msg)
self.ser.write(msg)
data = self.read_reply()
return self.parse_frame(data)
def set_temp(self,temp):
if not self.control_enabled: return False
# reduce to 1 dp resolution
temp = int(temp*10)*0.1
# only update if state has changed
if temp!=self.last_temp:
self.last_temp = temp
z1sp_a = int(temp*100)>>8
z1sp_b = int(temp*100) - (z1sp_a<<8)
print("Sending temp cmd "+str(temp))
# Update settings: FLAG, Z ,P , ? ,DHW, HC1, HC2, DHWSP, DHWSP, Z1, Z1 , Z2, Z2
msg = [0xfc,0x41,0x02,0x7a,16,0x32,0x80,0x00,0x00,0x02,0x00,0x00,0x00,0x00,0x00,z1sp_a,z1sp_b,0x00,0x00,0x00,0x00,0x00]
msg = self.calc_checksum(msg)
self.ser.write(msg)
data = self.read_reply()
return self.parse_frame(data)