use newest hex file when flasing

diff --git a/wlan_si/Makefile b/wlan_si/Makefile
index 77db1f5..b1b4134 100644 (file)
--- a/wlan_si/Makefile
+++ b/wlan_si/Makefile
@@ -4,7 +4,7 @@ all:
 pi=10.60.1.201
 
 flash:
-       scp /tmp/build*.tmp/*.hex pi@${pi}:/tmp/arduino.hex
+       scp `ls -t /tmp/build*.tmp/*.hex | head -1` pi@${pi}:/tmp/arduino.hex
        ssh pi@${pi} sudo avrdude -c linuxgpio -p atmega328p -U flash:w:/tmp/arduino.hex
 
 serial: