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 +17,15 @@ 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 + 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** ==41 +== **2.2 Point To Mult-Point ** == 40 40 41 41 42 42 [[image:image-20220602111219-2.png]] ... ... @@ -44,6 +44,170 @@ 44 44 45 45 [[image:image-20220602111219-3.png]] 46 46 49 +((( 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. 51 +))) 48 48 53 + 54 +== **2.3 AT command** == 55 + 56 + 57 +(% style="color:#037691" %)**ATZ** (%%)**: ** Trig a reset of the MCU 58 + 59 +(% style="color:#037691" %)**AT+FDR** (%%)**:** Reset Parameters to Factory Default, Keys Reserve 60 + 61 +(% style="color:#037691" %)**AT+FCU** (%%)**:** Get or Set the Frame Counter Uplink 62 + 63 +(% style="color:#037691" %)**AT+FCD** (%%)**:** Get or Set the Frame Counter Downlink 64 + 65 +(% style="color:#037691" %)**AT+TXP** (%%)**:** Get or Set the transmit power, the maximum is 20dBm (default is 14dBm) 66 + 67 +(% style="color:#037691" %)**AT+SYNC** (%%)**:** Get or Set the Sync word [1:0x34,0:0x12] (default is 1) 68 + 69 +(% style="color:#037691" %)**AT+PMB** (%%)**: **Get or Set the preamble (default:8) 70 + 71 +(% style="color:#037691" %)**AT+TXCHS **(%%)**:** Get or Set the transmit frequency of TX (default:868700000) 72 + 73 +(% style="color:#037691" %)**AT+TXSF **(%%)**:** Get or Set the spreading factor of TX (7 to 12) (default:12) 74 + 75 +(% style="color:#037691" %)**AT+RXCHS **(%%)**:** Get or Set the transmit frequency of RX (default:869000000) 76 + 77 +(% style="color:#037691" %)**AT+RXSF **(%%)**:** Get or Set the spreading factor of RX (7 to 12) (default:12) 78 + 79 +(% style="color:#037691" %)**AT+BW **(%%)**: **Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0) 80 + 81 +(% 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) 82 + 83 +(% style="color:#037691" %)**AT+TDC **(%%)**:** Get or set the application data transmission interval in ms(default 10 minutes) 84 + 85 +(% style="color:#037691" %)**AT+VER **(%%)**:** Get firmware version number 86 + 87 +(% style="color:#037691" %)**AT+SEND **(%%)**: **Set Custom sent hex data 88 + 89 +(% style="color:#037691" %)**AT+GROUPMOD **(%%)**: **Set or Get the grouping mode of the device (default: 0) 90 + 91 +((( 92 +(% 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) 93 +))) 94 + 95 +(% style="color:#037691" %)**AT+TRIG1 **(%%)**:** Set or Get the DI1 pin interrupt trigger mode (default 0,0) 96 + 97 +(% style="color:#037691" %)**AT+TRIG2 **(%%)**: **Set or Get the DI2 pin interrupt trigger mode (default 0,0) 98 + 99 +(% style="color:#037691" %)**AT+DI1TODO1 **(%%)**: **Set or get the mode in which DI1 maps to DO1 (default 0) 100 + 101 +(% style="color:#037691" %)**AT+DI1TORO1 **(%%)**: **Set or get the mode in which DI1 maps to RO1(default 0) 102 + 103 +(% style="color:#037691" %)**AT+DI2TODO2 **(%%)**:** Set or get the mode in which DI2 maps to DO2(default 0) 104 + 105 +(% style="color:#037691" %)**AT+DI2TORO2 **(%%)**: **Set or get the mode in which DI2 maps to RO2(default 0) 106 + 107 + 108 + 109 +(% style="color:#4f81bd" %)**Example 1:** 110 + 111 +**AT+SEND=01020304 **will send a payload of 01020304 112 + 113 + 114 +(% style="color:#4f81bd" %)**Example 2: ** 115 + 116 +**AT+TRIGx=a **Trigger directly without triggering time 117 + 118 +**AT+TRIGx=a,b** 119 + 120 +a=0: falling edge; 121 + 122 +a=1: rising edge; 123 + 124 +a=2: falling edge or rising edge; 125 + 126 +b: triggering time in milliseconds. 127 + 128 +AT+TRIGx=2,50 Falling edge or rising edge trigger, and the trigger time exceeds 50ms. 129 + 130 + 131 +(% style="color:#4f81bd" %)**Example 3: ** 132 + 133 +**AT+DI1TODO1= maps value** 134 + 135 +**AT+DI1TORO1= maps value** 136 + 137 +**AT+DI2TODO2= maps value** 138 + 139 +**AT+DI2TORO2= maps value** 140 + 141 + 142 +(% border="1" style="background-color:#f7faff; color:black; width:706px" %) 143 +|=(% style="width: 102px;" %)Maps value|=(% style="width: 331px;" %)DIx to DOx|=(% style="width: 268px;" %)DIx to ROx 144 +|(% style="width:102px" %)0|(% style="width:331px" %)No Action|(% style="width:268px" %)No Action 145 +|(% 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" %)((( 146 +If DIx is high, control ROx to close, 147 + 148 +if DIx is low, control ROx to open 149 +))) 150 +|(% 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" %)((( 151 +If DIx is high, control ROx to open, 152 + 153 +if DIx is low, control ROx to close 154 +))) 155 +|(% style="width:102px" %)3|(% style="width:331px" %)DOx state flip|(% style="width:268px" %)ROx state flip 156 + 157 +(% style="color:#4f81bd" %)**Example 4: ** 158 + 159 +**AT+GROUPMOD=0** Set to point to point mode 160 + 161 +**AT+GROUPMOD=0,aa** Set the TX group that controls the number of aa (The maximum value of aa is 8) 162 + 163 +((( 164 +**AT+GROUPMOD=1,bb** Set to the RX group controlled by the TX group, numbered bb(The maximum value of aa is 8) 165 +))) 166 + 167 +**AT+GROUPMOD=0,2** Set to control the TX group of the two RX groups 168 + 169 +**AT+GROUPMOD=1,1** Set the RX group numbered 1 170 + 171 +**AT+GROUPMOD=1,2** Set the RX group numbered 2 172 + 173 + 174 +== **2.4 Data Format** == 175 + 176 +8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum 177 + 178 + 179 +(% style="color:#4f81bd" %)**Payload:** 180 + 181 +(% border="1" style="background-color:#f7faff; color:black; width:938px" %) 182 +|=(% 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;" %)1 183 +|(% style="width:123px" %)**Value**|(% style="width:38px" %)address|(% style="width:70px" %)request|(% style="width:52px" %)ACK|(% style="width:127px" %)((( 184 +DI1& 185 + 186 +DI1 level 187 +)))|(% style="width:101px" %)DI1TODO1|(% style="width:91px" %)DI1TORO1|(% style="width:111px" %)((( 188 +DI2& 189 + 190 +DI2 level 191 +)))|(% style="width:105px" %)DI2TODO2|(% style="width:106px" %)DI2TORO2 192 + 193 +(% style="color:#037691" %)**The first byte**(%%)**:** 00 is the broadcast address, 01-08 is the RX group number. 194 + 195 +(% style="color:#037691" %)**The second byte**(%%)**:** send mapping request when not 0, not request when it is 0. 196 + 197 +(% style="color:#037691" %)**The third byte**(%%)**:** ACK returned to the sender after the mapping is completed. 198 + 199 +((( 200 +(% 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. 201 +))) 202 + 203 +(% style="color:#037691" %)**The Fifth byte**(%%)**: **DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered. 204 + 205 +(% style="color:#037691" %)**The Sixth byte**(%%)**:** 0 does not trigger interrupt when DI1TORO1 interrupt is triggered. 206 + 207 +((( 208 +(% 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. 209 +))) 210 + 211 +(% style="color:#037691" %)**The 8th byte**(%%)**: **DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered. 212 + 213 +(% style="color:#037691" %)**The 9th byte**(%%)**:** DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered. 214 + 49 49