# Jonathan Hare G1EXG, Jan 27,28 th 2026
# after Phil G4UDU tests 4th March 2026
# add delay at start, change address to MK II, add UART timeout 
# WADARC IC7300 MKII CI-V RF relay control

# sets RF relays OFF for HF
# sets RF relay 1 ON for 6m band
# sets RF relay 1 and 2 ON for 4m band
# sets RF power to 100 % for 7MHz and up
# sets RF power to 5% for < 7MHz

# see end of code for more info.

from machine import UART, Pin
import time

led_onboard = machine.Pin(25, machine.Pin.OUT)
relay_1 = machine.Pin(14, machine.Pin.OUT)   # RF relay 1
relay_2 = machine.Pin(15, machine.Pin.OUT)   # RF relay 2

BAUDRATE = 19200
CTRL_ADDR = 0xE0

# IC7300_ADDR = 0x94  # MK I address
IC7300_ADDR = 0xB6  # MK II address
IC9700_ADDR = 0xA2  # use this for IC9700

BUFFER_SIZE = 25    # dont need a large buffer for IC-V data
                    # on pi Pico
freq = 0
        
uart = UART(
    0,
    baudrate=BAUDRATE,
    tx=Pin(0),
    rx=Pin(1),
    bits=8,
    parity=None,
    stop=1,
    timeout=1000 # ms timeout for data to stop blocking 
)

def set_pwr_5(radio_addr):
    cmd = bytes([
        0xFE, 0xFE,
        radio_addr,
        CTRL_ADDR,
        0x14,       # Tx power
        0x0A,       # Tx power
        0x00, 0x15,     # sets power = 5%
        0xFD
    ])
    uart.write(cmd)
    time.sleep_ms(20)
    
def set_pwr_100(radio_addr):
    cmd = bytes([
        0xFE, 0xFE,
        radio_addr,
        CTRL_ADDR,
        0x14,       # Tx power
        0x0A,       # Tx power
        0x02, 0x55,     # sets power = 100%
        0xFD
    ])
    uart.write(cmd)
    time.sleep_ms(20)
    
def freq_request(radio_addr):
    cmd = bytes([
        0xFE, 0xFE,
        radio_addr,
        CTRL_ADDR,
        0x03,       # request freq
        0xFD
    ])
    uart.write(cmd)
    time.sleep_ms(20)

time.sleep_ms(5000) # 5 sec delay to allow transeiver to boot up

# MAIN PROGRAM STARTS HERE

relay_1(0) # set relay 1 OFF
relay_2(0) # set relay 2 OFF

while True:
    uart.read()    # empty UART buffer of other CI-V frames
    freq_request(IC7300_ADDR)   # request frequency
    uart.read(6)    # remove freq request frames
                    # and just leave reply from radio   

    if uart.any():                 # ignore empty UART (i.e. = 0)
        data_all = uart.read()     # Read UART data
        bcd = data_all[8]
        freq_mhz = bcd & 15       # calculate interger MHz
        freq_10mhz = int ((bcd & 120)/16)
        freq = freq_mhz + 10*freq_10mhz

# thonny print 'tools' for debuging
#        print("Received (raw):", freq)        
#        print("Received (raw):", data_all[1])
#        print("Received (raw):", data_all)

    if freq >= 1 and freq < 7:
        set_pwr_5(IC7300_ADDR) # set low power
        relay_1(0)
        relay_2(0)
                
    if freq >= 7 and freq < 50:
        set_pwr_100(IC7300_ADDR) # set high power
        relay_1(0)
        relay_2(0)

    if freq >= 50 and freq < 52:
        set_pwr_100(IC7300_ADDR) # set high power
        relay_1(1)
        relay_2(0)

    if freq >= 52 and freq <= 70:
        set_pwr_5(IC7300_ADDR) # set low power
        relay_1(0)
        relay_2(0)

    if freq >= 70 and freq <= 72:
        set_pwr_100(IC7300_ADDR) # set high power
        relay_1(1)
        relay_2(1)

    if freq >= 72:
        set_pwr_5(IC7300_ADDR) # set low power
        relay_1(0)
        relay_2(0)

    led_onboard(1)   # flash on board (green) led
    time.sleep_ms(100)        
    led_onboard(0)
        
    time.sleep_ms(5000) # ping radio once every 5 seconds
    
# 'ping' freq data every 5 seconds
# add on-board green led flash
# UART Tx on GP0, UART Rx on GP1
# 7417 is 5V logic while Pi Pico is 3V: so use 5-3V pot div for Rx