# 0 PROTOCOL ID
# 1 PROTOCOL_VERSION 
# 2 CTRL_FLAGS
# 3 PKT_TYPE 
# 4 SEQ_NUM 
# 5 ACK_RETRY | PRIORITY 
# 6 SUBNET_MAC_3 
# 7 SUBNET_MAC_2
# 8 SUBNET_MAC_1
# 9 LAST_HOP_MAC 
# 10 HOP_CNT
# 11 HOP_MAX
# 12 DELAY_PER_LEVEL 
# 13 NAV 
# 14 MAC_CHECK_RATE 
# 15 RSSI_THRESHOLD (int8_t)
# 16 AES_CTR_3
# 17 AES_CTR_2
# 18 AES_CTR_1
# 19 AES_CTR_0
# 20+ MAC FILTER LIST
# 0   1    2    3    4   5    6    7    8    9    10    11  12   13   14   15   16   17   18   19   20


# Ping with LED
0x01 0x01 0x39 0x01 0x00 0xf0 0x00 0x00 0x00 0x00 0x00 0x06 0x01 0x1e 0x64 0xd3 0x00 0x00 0x00 0x00

