Changes for page Point to Point Communication of LT-22222-L
Last modified by Edwin Chen on 2022/11/22 09:38
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... ... @@ -17,13 +17,16 @@ 17 17 = **2. Features for this firmware** = 18 18 19 19 20 -== **2.1 Overview** ==20 +== **2.1 Point To Point** == 21 21 22 -[[image:image-20220602111219-1.png]] 23 23 23 +[[image:image-20220602111219-1.png||height="472" width="972"]] 24 24 25 -== **2.2. Configure** == 26 26 26 +(% class="wikigeneratedid" id="H2.2.Configure" %) 27 +(% style="color:blue" %)**Configure:** 28 + 29 + 27 27 (% border="1" style="background-color:#f7faff; color:black; width:500px" %) 28 28 |=**A's configuration**|=**B's configuration** 29 29 |AT+GROUPMOD=0|AT+GROUPMOD=0 ... ... @@ -36,7 +36,7 @@ 36 36 |AT+DI2TODO2=2 |AT+DI2TODO2=2 37 37 |AT+DI2TORO2=2|AT+DI2TORO2=2 38 38 39 -== **2. 3.Serialportdisplay** ==42 +== **2.2 Point To Mult-Point ** == 40 40 41 41 42 42 [[image:image-20220602111219-2.png]] ... ... @@ -46,4 +46,158 @@ 46 46 47 47 If the sender does not get the ACK reply from the receiver, it will retransmit up to 4 times, each interval is 6 seconds, and the UplinkCounter of the retransmission will not increase. 48 48 52 + 53 +== **2.3 AT command** == 54 + 55 + 56 +(% style="color:#037691" %)**ATZ** (%%)**: ** Trig a reset of the MCU 57 + 58 +(% style="color:#037691" %)**AT+FDR** (%%)**:** Reset Parameters to Factory Default, Keys Reserve 59 + 60 +(% style="color:#037691" %)**AT+FCU** (%%)**:** Get or Set the Frame Counter Uplink 61 + 62 +(% style="color:#037691" %)**AT+FCD** (%%)**:** Get or Set the Frame Counter Downlink 63 + 64 +(% style="color:#037691" %)**AT+TXP** (%%)**:** Get or Set the transmit power, the maximum is 20dBm (default is 14dBm) 65 + 66 +(% style="color:#037691" %)**AT+SYNC** (%%)**:** Get or Set the Sync word [1:0x34,0:0x12] (default is 1) 67 + 68 +(% style="color:#037691" %)**AT+PMB** (%%)**: **Get or Set the preamble (default:8) 69 + 70 +(% style="color:#037691" %)**AT+TXCHS **(%%)**:** Get or Set the transmit frequency of TX (default:868700000) 71 + 72 +(% style="color:#037691" %)**AT+TXSF **(%%)**:** Get or Set the spreading factor of TX (7 to 12) (default:12) 73 + 74 +(% style="color:#037691" %)**AT+RXCHS **(%%)**:** Get or Set the transmit frequency of RX (default:869000000) 75 + 76 +(% style="color:#037691" %)**AT+RXSF **(%%)**:** Get or Set the spreading factor of RX (7 to 12) (default:12) 77 + 78 +(% style="color:#037691" %)**AT+BW **(%%)**: **Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0) 79 + 80 +(% style="color:#037691" %)**AT+CR **(%%)**: **Get or Set the coding rate [1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8] (default:1) 81 + 82 +(% style="color:#037691" %)**AT+TDC **(%%)**:** Get or set the application data transmission interval in ms(default 10 minutes) 83 + 84 +(% style="color:#037691" %)**AT+VER **(%%)**:** Get firmware version number 85 + 86 +(% style="color:#037691" %)**AT+SEND **(%%)**: **Set Custom sent hex data 87 + 88 +(% style="color:#037691" %)**AT+GROUPMOD **(%%)**: **Set or Get the grouping mode of the device (default: 0) 89 + 90 +(% style="color:#037691" %)**AT+GROUPID **(%%)**: **Set or Get the password for matching between TX group and RX group, which can be composed of numbers or characters (default: 12345678) 91 + 92 +(% style="color:#037691" %)**AT+TRIG1 **(%%)**:** Set or Get the DI1 pin interrupt trigger mode (default 0,0) 93 + 94 +(% style="color:#037691" %)**AT+TRIG2 **(%%)**: **Set or Get the DI2 pin interrupt trigger mode (default 0,0) 95 + 96 +(% style="color:#037691" %)**AT+DI1TODO1 **(%%)**: **Set or get the mode in which DI1 maps to DO1 (default 0) 97 + 98 +(% style="color:#037691" %)**AT+DI1TORO1 **(%%)**: **Set or get the mode in which DI1 maps to RO1(default 0) 99 + 100 +(% style="color:#037691" %)**AT+DI2TODO2 **(%%)**:** Set or get the mode in which DI2 maps to DO2(default 0) 101 + 102 +(% style="color:#037691" %)**AT+DI2TORO2 **(%%)**: **Set or get the mode in which DI2 maps to RO2(default 0) 103 + 104 + 105 + 106 +(% style="color:#4f81bd" %)**Example 1:** 107 + 108 +**AT+SEND=01020304 **will send a payload of 01020304 109 + 110 + 111 +(% style="color:#4f81bd" %)**Example 2: ** 112 + 113 +**AT+TRIGx=a **Trigger directly without triggering time 114 + 115 +**AT+TRIGx=a,b** 116 + 117 +a=0: falling edge; 118 + 119 +a=1: rising edge; 120 + 121 +a=2: falling edge or rising edge; 122 + 123 +b: triggering time in milliseconds. 124 + 125 +AT+TRIGx=2,50 Falling edge or rising edge trigger, and the trigger time exceeds 50ms. 126 + 127 + 128 +(% style="color:#4f81bd" %)**Example 3: ** 129 + 130 +**AT+DI1TODO1= maps value** 131 + 132 +**AT+DI1TORO1= maps value** 133 + 134 +**AT+DI2TODO2= maps value** 135 + 136 +**AT+DI2TORO2= maps value** 137 + 138 + 139 +(% border="1" style="background-color:#f7faff; color:black; width:706px" %) 140 +|=(% style="width: 102px;" %)Maps value|=(% style="width: 331px;" %)DIx to DOx|=(% style="width: 268px;" %)DIx to ROx 141 +|(% style="width:102px" %)0|(% style="width:331px" %)No Action|(% style="width:268px" %)No Action 142 +|(% style="width:102px" %)1|(% style="width:331px" %)If DIx is high, control DOx to output low level, If DIx is low, control DOx to output high level|(% style="width:268px" %)((( 143 +If DIx is high, control ROx to close, 144 + 145 +if DIx is low, control ROx to open 146 +))) 147 +|(% style="width:102px" %)2|(% style="width:331px" %)If DIx is high, control DOx to output high level, If DIx is low, control DOx to output low level|(% style="width:268px" %)((( 148 +If DIx is high, control ROx to open, 149 + 150 +if DIx is low, control ROx to close 151 +))) 152 +|(% style="width:102px" %)3|(% style="width:331px" %)DOx state flip|(% style="width:268px" %)ROx state flip 153 + 154 +(% style="color:#4f81bd" %)**Example 4: ** 155 + 156 +**AT+GROUPMOD=0** Set to point to point mode 157 + 158 +**AT+GROUPMOD=0,aa** Set the TX group that controls the number of aa (The maximum value of aa is 8) 159 + 160 +**AT+GROUPMOD=1,bb** Set to the RX group controlled by the TX group, numbered bb(The maximum value of aa is 8) 161 + 162 +**AT+GROUPMOD=0,2** Set to control the TX group of the two RX groups 163 + 164 +**AT+GROUPMOD=1,1** Set the RX group numbered 1 165 + 166 +**AT+GROUPMOD=1,2** Set the RX group numbered 2 167 + 168 + 169 +== **2.4 Data Format** == 170 + 171 +8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum 172 + 173 + 174 +(% style="color:#4f81bd" %)**Payload:** 175 + 176 +(% border="1" style="background-color:#f7faff; color:black; width:938px" %) 177 +|=(% style="width: 123px;" %)**Size (bytes)**|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1|=(% style="width: 107px;" %)1 178 +|(% style="width:123px" %)**Value**|(% style="width:38px" %)address|(% style="width:70px" %)request|(% style="width:52px" %)ACK|(% style="width:127px" %)((( 179 +DI1& 180 + 181 +DI1 level 182 +)))|(% style="width:101px" %)DI1TODO1|(% style="width:91px" %)DI1TORO1|(% style="width:111px" %)((( 183 +DI2& 184 + 185 +DI2 level 186 +)))|(% style="width:105px" %)DI2TODO2|(% style="width:106px" %)DI2TORO2 187 + 188 +(% style="color:#037691" %)**The first byte**(%%)**:** 00 is the broadcast address, 01-08 is the RX group number. 189 + 190 +(% style="color:#037691" %)**The second byte**(%%)**:** send mapping request when not 0, not request when it is 0. 191 + 192 +(% style="color:#037691" %)**The third byte**(%%)**:** ACK returned to the sender after the mapping is completed. 193 + 194 +(% style="color:#037691" %)**The fourth byte**(%%)**:** the high four bits are 1 to represent DI1, and the low four bits are the level of DI1 when the interrupt is triggered. 195 + 196 +(% style="color:#037691" %)**The Fifth byte**(%%)**: **DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered. 197 + 198 +(% style="color:#037691" %)**The Sixth byte**(%%)**:** 0 does not trigger interrupt when DI1TORO1 interrupt is triggered. 199 + 200 +(% style="color:#037691" %)**The seventh byte**(%%)**:** the high four bits are 2 to represent DI2, and the low four bits are the level of DI2 when the interrupt is triggered. 201 + 202 +(% style="color:#037691" %)**The 8th byte**(%%)**: **DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered. 203 + 204 +(% style="color:#037691" %)**The 9th byte**(%%)**:** DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered. 205 + 49 49