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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... ... @@ -17,16 +17,13 @@ 17 17 = **2. Features for this firmware** = 18 18 19 19 20 -== **2.1 Point To Point** ==20 +== **2.1 Overview** == 21 21 22 +[[image:image-20220602111219-1.png]] 22 22 23 -[[image:image-20220602111219-1.png||height="472" width="972"]] 24 24 25 +== **2.2. Configure** == 25 25 26 -(% class="wikigeneratedid" id="H2.2.Configure" %) 27 -(% style="color:blue" %)**Configure:** 28 - 29 - 30 30 (% border="1" style="background-color:#f7faff; color:black; width:500px" %) 31 31 |=**A's configuration**|=**B's configuration** 32 32 |AT+GROUPMOD=0|AT+GROUPMOD=0 ... ... @@ -39,11 +39,8 @@ 39 39 |AT+DI2TODO2=2 |AT+DI2TODO2=2 40 40 |AT+DI2TORO2=2|AT+DI2TORO2=2 41 41 39 +== **2.3. Serial port display** == 42 42 43 - 44 -== **2.2 Point To Mult-Point ** == 45 - 46 - 47 47 [[image:image-20220602111219-2.png]] 48 48 49 49 ... ... @@ -51,154 +51,4 @@ 51 51 52 52 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. 53 53 54 - 55 -== **2.3 AT command** == 56 - 57 - 58 -ATZ : Trig a reset of the MCU 59 - 60 -AT+FDR : Reset Parameters to Factory Default, Keys Reserve 61 - 62 -AT+FCU : Get or Set the Frame Counter Uplink 63 - 64 -AT+FCD : Get or Set the Frame Counter Downlink 65 - 66 -AT+TXP : Get or Set the transmit power, the maximum is 20dBm (default is 14dBm) 67 - 68 -AT+SYNC : Get or Set the Sync word [1:0x34,0:0x12] (default is 1) 69 - 70 -AT+PMB : Get or Set the preamble (default:8) 71 - 72 -AT+TXCHS : Get or Set the transmit frequency of TX (default:868700000) 73 - 74 -AT+TXSF : Get or Set the spreading factor of TX (7 to 12) (default:12) 75 - 76 -AT+RXCHS : Get or Set the transmit frequency of RX (default:869000000) 77 - 78 -AT+RXSF : Get or Set the spreading factor of RX (7 to 12) (default:12) 79 - 80 -AT+BW : Get or Set the bandwidth [0:125khz,1:250khz,2:500khz] (default:0) 81 - 82 -AT+CR : Get or Set the coding rate [1: 4/5, 2: 4/6, 3: 4/7, 4: 4/8] (default:1) 83 - 84 -AT+TDC : Get or set the application data transmission interval in ms(default 10 minutes) 85 - 86 -AT+VER : Get firmware version number 87 - 88 -AT+SEND : Set Custom sent hex data 89 - 90 -AT+GROUPMOD : Set or Get the grouping mode of the device (default: 0) 91 - 92 -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 -AT+TRIG1 : Set or Get the DI1 pin interrupt trigger mode (default 0,0) 95 - 96 -AT+TRIG2 : Set or Get the DI2 pin interrupt trigger mode (default 0,0) 97 - 98 -AT+DI1TODO1 : Set or get the mode in which DI1 maps to DO1 (default 0) 99 - 100 -AT+DI1TORO1 : Set or get the mode in which DI1 maps to RO1(default 0) 101 - 102 -AT+DI2TODO2 : Set or get the mode in which DI2 maps to DO2(default 0) 103 - 104 -AT+DI2TORO2 : Set or get the mode in which DI2 maps to RO2(default 0) 105 - 106 - 107 - 108 -i.g. AT+SEND=01020304 will send a payload of 01020304 109 - 110 - 111 -i.g. AT+TRIGx=a Trigger directly without triggering time 112 - 113 -AT+TRIGx=a,b a=0, falling edge; 114 - 115 -a=1, rising edge; 116 - 117 - a=2, falling edge or rising edge. 118 - 119 - b, triggering time in milliseconds 120 - 121 - AT+TRIGx=2,50 Falling edge or rising edge trigger, and the trigger time exceeds 50ms 122 - 123 - 124 -i.g. AT+DI1TODO1= maps value 125 - 126 - AT+DI1TORO1= maps value 127 - 128 -AT+DI2TODO2= maps value 129 - 130 -AT+DI2TORO2= maps value 131 - 132 - 133 - 134 - 135 -(% style="width:706px" %) 136 -|(% style="width:102px" %)Maps value|(% style="width:331px" %)DIx to DOx|(% style="width:268px" %)DIx to ROx 137 -|(% style="width:102px" %)0|(% style="width:331px" %)No Action|(% style="width:268px" %)No Action 138 -|(% 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" %)((( 139 -If DIx is high, control ROx to close, 140 - 141 -if DIx is low, control ROx to open 142 -))) 143 -|(% 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" %)((( 144 -If DIx is high, control ROx to open, 145 - 146 -if DIx is low, control ROx to close 147 -))) 148 -|(% style="width:102px" %)3|(% style="width:331px" %)DOx state flip|(% style="width:268px" %)ROx state flip 149 - 150 -i.g. AT+GROUPMOD=0 Set to point to point mode 151 - 152 -AT+GROUPMOD=0,aa Set the TX group that controls the number of aa (The maximum value of aa is 8) 153 - 154 -AT+GROUPMOD=1,bb Set to the RX group controlled by the TX group, numbered bb(The maximum value of aa is 8) 155 - 156 - 157 -AT+GROUPMOD=0,2 Set to control the TX group of the two RX groups 158 - 159 -AT+GROUPMOD=1,1 Set the RX group numbered 1 160 - 161 -AT+GROUPMOD=1,2 Set the RX group numbered 2 162 - 163 - 164 - 165 -== **2.4 Data Format** == 166 - 167 -8 bytes of GROUPID + 9 bytes of payload + 4 bytes of checksum 168 - 169 - 170 -Payload: 171 - 172 -|**Size (bytes)**|(% colspan="2" %)**1**|(% colspan="2" %)**1**|(% colspan="2" %)**1**|(% colspan="2" %)**1**|**1** 173 -|**Value**|(% colspan="2" %)address|(% colspan="2" %)request|(% colspan="2" %)ACK|(% colspan="2" %)((( 174 -DI1& 175 - 176 -DI1 level 177 -)))|DI1TODO1 178 -|(% colspan="2" %)**1**|(% colspan="2" %)**1**|(% colspan="2" %)**1**|(% colspan="2" %)**1**|(% colspan="2" %) 179 -|(% colspan="2" %)DI1TORO1|(% colspan="2" %)((( 180 -DI2& 181 - 182 -DI2 level 183 -)))|(% colspan="2" %)DI2TODO2|(% colspan="2" %)DI2TORO2|(% colspan="2" %) 184 -| | | | | | | | | | 185 - 186 -The first byte: 00 is the broadcast address, 01-08 is the RX group number 187 - 188 -The second byte: send mapping request when not 0, not request when it is 0 189 - 190 -The third byte: ACK returned to the sender after the mapping is completed 191 - 192 -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 193 - 194 -The Fifth byte: DI1TODO1 when the interrupt is triggered, 0 when the interrupt is not triggered 195 - 196 -The Sixth byte: 0 does not trigger interrupt when DI1TORO1 interrupt is triggered 197 - 198 -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 199 - 200 -The 8th byte: DI2TODO2 when the interrupt is triggered, 0 when the interrupt is not triggered 201 - 202 -The 9th byte: DI2TORO2 when an interrupt is triggered, 0 when an interrupt is not triggered 203 - 204 204