rss_scanner.bgs

# USB CDC RX
dim rx_return_code
dim rx_return_data_size
dim rx_return_data(8) 

# characteristic value (2-byte array)
dim measure_buf(3) 

# Boot event listener
event system_boot(major, minor, patch, build, ll_version, protocol_version, hw)
	
    measure_buf(0:2) = 0    # beacon ID
    measure_buf(1:2) = 0    # location ID
	measure_buf(2:2) = 0    # RSS measurement

    call system_endpoint_set_watermarks(3, 1, 0)
   
    call gap_set_adv_parameters(32, 48, 7)

    call gap_set_mode(gap_general_discoverable, gap_undirected_connectable)

    call gap_set_scan_parameters($c8, $c8, 0)
end

event connection_status(connection, flags, address, address_type, conn_interval, timeout, latency, bonding)
    if flags & $05 then
		call gap_discover(gap_discover_generic)
    end if
end

event gap_scan_response(rssi, packet_type, sender, address_type, bond, data_len, data_data)
	
	if packet_type = 2 then
	
		if data_data(10:1) = $44 && data_data(9:1) = $44 && data_data(24:1) = $44 then

			# update characteristic 
			measure_buf(0:2) = data_data(26:1)    	# beacon ID
			measure_buf(1:2) = 0    				# location ID
			measure_buf(2:2) = $100 - rssi    		# RSS measurement
			
			# write charachteristc
			call attributes_write(c_beacons_rss, 0, 3, measure_buf(0:3))	
			
		end if
    end if
	
end

event connection_disconnected(handle, result)
    call gap_set_adv_parameters(32, 48, 7)
    call gap_set_mode(gap_general_discoverable, gap_undirected_connectable)
	call gap_discover(gap_discover_generic)
end  


# listen to USB CDC and reboot into DFU when ASCII '0' is received
event system_endpoint_watermark_rx(endpoint, size)
    call system_endpoint_rx(endpoint, size)(rx_return_code, rx_return_data_size, rx_return_data(0:rx_return_data_size))
    if rx_return_data(0:1) = $30 then
        call system_reset(1)
    end if
end