MCU: STM32F437
IDE: IAR for ARM v7.8
Script env: Python 3.6
Script path: WiFi_Camera_Firmware/script
StartCode(5) + Command(1) + Index(2) + Length(2) + Payload(0~1000) + Checksum(1) + EndCode(5)
Checksum is the sum start from command to the last payload data
16bit and 32bit data all low byte at first
Message Command Size without Payload: 16 bytes
Max Transmit Payload: 1000 bytes
Max Receive Payload: 1000 bytes
/* Recognize code */
#define MSG_RECOGNIZE_CODE_LEN 5 /* 5 */
#define MSG_START_CODE 0x7B /* 123 */
#define MSG_END_CODE 0xA8 /* -88 */
/* App get command code */
#define MSG_GET_BASE 0x10
#define MSG_GET_MAC (MSG_GET_BASE + 1)
#define MSG_GET_IMAGE (MSG_GET_BASE + 2)
#define MSG_GET_STATE (MSG_GET_BASE + 3)
#define MSG_GET_VERSION (MSG_GET_BASE + 4)
/* App set command code */
#define MSG_SET_BASE 0x20
#define MSG_SET_ACCOUNT (MSG_SET_BASE + 1)
#define MSG_SET_WIFI (MSG_SET_BASE + 2)
#define MSG_SET_MOTOR (MSG_SET_BASE + 3)
#define MSG_SET_TIME (MSG_SET_BASE + 4)
#define MSG_SET_SCH (MSG_SET_BASE + 5)
/* Device push command code */
#define MSG_PUSH_BASE 0x30
#define MSG_PUSH_IMAGE (MSG_PUSH_BASE + 1)
#define MSG_PUSH_ACCOUNT (MSG_PUSH_BASE + 2)
#define MSG_PUSH_ALARM (MSG_PUSH_BASE + 3)
/* App ota update code */
#define MSG_OTA_BASE 0x40
#define MSG_OTA_REQUEST (MSG_OTA_BASE + 1)
#define MSG_OTA_BIN (MSG_OTA_BASE + 2)
#define MSG_OTA_VERIFY (MSG_OTA_BASE + 3)
/* Factory new magic code */
#define MSG_FACTORY_NEW 0xA5
/* Feedback state code */
#define MSG_FB_BASE 0xF0
#define MSG_FB_OK (MSG_FB_BASE + 0)
#define MSG_FB_UPDATED (MSG_FB_BASE + 1) /* For ota request */
#define MSG_FB_ERROR (MSG_FB_BASE + 2)App Tx: command, no payload
7B 7B 7B 7B 7B 14 00 00 00 00 14 A8 A8 A8 A8 A8App Rx: feedback ok + 2 bytes payload of version value: V2.05 = 205 = 0xCD
7B 7B 7B 7B 7B F0 00 00 02 00 CD 00 BF A8 A8 A8 A8 A8
App Tx: command, no payload
7B 7B 7B 7B 7B 11 00 00 00 00 11 A8 A8 A8 A8 A8 App Rx: feedback ok + 18 bytes payload of mac string: 68:C6:3A:A0:FC:5F
7B 7B 7B 7B 7B F0 00 00 12 00 36 38 3A 43 36 3A 33 41 3A 41 30 3A 46 43 3A 35 46 00 F4 A8 A8 A8 A8 A8
App Tx: command, no payload
7B 7B 7B 7B 7B 12 00 00 00 00 12 A8 A8 A8 A8 A8 App Rx: feedback ok and wait for push image
7B 7B 7B 7B 7B F0 00 00 00 00 F0 A8 A8 A8 A8 A8 
App Tx: command, no payload
7B 7B 7B 7B 7B A5 00 00 00 00 A5 A8 A8 A8 A8 A8 App Rx: feedback ok and disconnect
7B 7B 7B 7B 7B F0 00 00 00 00 F0 A8 A8 A8 A8 A8 
App Tx: command,
length=2+ssid length(<=32)+passwd length(<=32)
payload: ssid length(1 byte), passwd length(1byte), ssid string, passwd string
7B 7B 7B 7B 7B 22 00 00 0D 00 03 08 41 42 43 31 32 33 34 35 36 37 38 A4 A8 A8 A8 A8 A8 App Rx: feedback ok
7B 7B 7B 7B 7B F0 00 00 00 00 F0 A8 A8 A8 A8 A8 
App Tx: command,
length=4+server length(<=64)+port length(=2) + web id length(<=32) + passwd length(<=32)
payload: server length(1 byte), port length(1byte), web id length(1byte), passwd length(1byte), server string, port value(2byte), web id string web passwd string
7B 7B 7B 7B 7B 21 00 00 23 00 0B 02 07 0B 31 39 32 2E 31 36 38 2E 31 2E 32 90 1F 69 64 5F 30 30 30 31 41 42 43 44 45 46 47 48 49 4A 4B 29 A8 A8 A8 A8 A8 App Rx: feedback ok
7B 7B 7B 7B 7B F0 00 00 00 00 F0 A8 A8 A8 A8 A8 
App Tx: command,
length=7
payload: year value 2bytes, month value, day value, hour value, minute value, second value
7B 7B 7B 7B 7B 24 00 00 07 00 E2 07 03 07 17 14 0D 56 A8 A8 A8 A8 A8 App Rx: feedback ok
7B 7B 7B 7B 7B F0 00 00 00 00 F0 A8 A8 A8 A8 A8 
App Tx: command,
length=7 * plan number
payload: Time hour value(1byte), time minute value(1byte) , motor1 feed level(1byte) , motor2feed level(1byte) , motor3 feed level(1byte) , motor4 feed level(1byte) , motor5 feed level(1byte), add has more plan, add schedule until finish
7B 7B 7B 7B 7B 25 00 00 0E 00 0B 1E 01 02 03 04 05 0F 2D 07 05 03 00 00 B6 A8 A8 A8 A8 A8 App Rx: feedback ok
7B 7B 7B 7B 7B F0 00 00 00 00 F0 A8 A8 A8 A8 A8 
App Tx: command,
length=25
payload: dir1(1 char ‘R’ or ‘L’), dir2,dir3,dir4,dir5, Freq1(2byte) , Freq2, Freq3, Freq4, Freq5, UnitStep1(2bytes) , UnitStep2, UnitStep3, UnitStep4, UnitStep5
7B 7B 7B 7B 7B 23 00 00 19 00 52 52 4C 4C 4C E8 03 E8 03 E8 03 E8 03 E8 03 C8 00 C8 00 C8 00 C8 00 C8 00 43 A8 A8 A8 A8 A8 App Rx: feedback ok
7B 7B 7B 7B 7B F0 00 00 00 00 F0 A8 A8 A8 A8 A8 
App Rx: command,
Index = 0
length=4 + filename length
payload: image size(4bytes, 32bit), filename string
App Rx: command,
Index > 0
length=image packet data size
payload: image data
App Tx: command, MSG_OTA_REQUEST
length=2
payload: new version 2bytes(example 206)
7B 7B 7B 7B 7B 41 00 00 02 00 CE 00 11 A8 A8 A8 A8 A8 App Rx: feedback updated; because new version is the same as device, device return updated to reject ota
7B 7B 7B 7B 7B F1 00 00 00 00 F1 A8 A8 A8 A8 A8 App Rx: feedback ok, if device version is lower than new version, return ok to start ota
7B 7B 7B 7B 7B F0 00 00 00 00 F0 A8 A8 A8 A8 A8
App Tx: command, MSG_OTA_BIN
Index = bin packet id
length=bin data size
payload: bin data
App Rx: feedback ok to continue next packet
7B 7B 7B 7B 7B F0 00 00 00 00 F0 A8 A8 A8 A8 A8App Tx: command, MSG_OTA_VERIFY
length=0
payload: none
7B 7B 7B 7B 7B 43 00 00 00 00 43 A8 A8 A8 A8 A8App Rx: feedback ok if verify ok and disconnect to reset mcu
7B 7B 7B 7B 7B F0 00 00 00 00 F0 A8 A8 A8 A8 A8
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