-- Location Broadcaster Script
-- This script gets your GPS position and broadcasts it over a modem

-- Find and wrap the modem peripheral
local modem = peripheral.find("modem")
if not modem then
    error("No modem found!  Please attach a wireless modem.")
end

-- Open a channel for broadcasting (channel 1 in this case)
-- The turtle listening must also be on channel 1
modem. open(1)

print("Location Broadcaster Started")
print("Broadcasting on channel 1...")
print("Press Ctrl+T to stop")

-- Main loop - broadcasts position every 2 seconds
while true do
    -- Get current GPS coordinates
    -- Requires GPS satellites to be set up in your world
    local x, y, z = gps. locate(5) -- 5 second timeout
    
    if x then
        -- Successfully got position
        print(string.format("Position: X=%.1f, Y=%.1f, Z=%.1f", x, y, z))
        
        -- Broadcast the coordinates as a table
        -- Channel 1 = broadcast channel
        -- Channel 1 = reply channel (not used here, but required)
        modem.transmit(1, 1, {x = x, y = y, z = z})
        
        print("Broadcasted position!")
    else
        -- GPS lookup failed
        print("Unable to get GPS position. Are GPS satellites set up?")
    end
    
    -- Wait 2 seconds before next broadcast
    sleep(2)
end