Differences

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--- manual [2020/11/30 19:19]
bgfdsuperadmin
+++ manual [2020/11/30 20:40]
bgfdsuperadmin
@@ Line 4: / Line 4: @@
 //Edited by Bluegoldfishdesign 20-Nov-20//
-{{ https://www.allaboutcircuits.com/uploads/articles/Hughes_HC12_HC12.jpg }}
+{{ hc12:hc12pcb.png }}
-{{ wiki:help.png }}
 === Product Applications ===
   * Wireless sensor
@@ Line 77: / Line 77: @@
 === Product Dimensions ===
-{{ wiki:HC-12_dimensions.png }}
+{{ hc12:hc12dimensions.png }}
-Definition of Pins
+=== Definition of Pins ===
 The HC-12 module can be patch soldered, or have a 2.54mm-spacing pin header
 attached and directly inserted onto the user’s PCB. The module has nine pins in
 total, and one RF antenna socket (ANT1), with definitions as shown in the table
 below:
-Pin Definition I/O direction Notes
-Vcc
+^ Pin ^ Definition ^ I/O direction ^ Notes ^
-Power supply input, DC3.2V-5.5V, with load
+| 1 | Vcc |  | Power supply input, DC3.2V-5.5V, with load capacity not less than 200mA. Note: if the module is working in the transmitting state for an extended time, it is suggested that a 1N4007 diode be connected in series if the supply voltage is greater than 4.5V, so as to avoid overheating the onboard LDO regulator |
-capacity not less than 200mA. Note: if the
+| 2 | GND |  | Common ground |
-module is working in the transmitting state
+| 3 | RxD | Input (weak pullup) | UART data input, TTL level. 1k resistor connected in series inside the module |
-for an extended time, it is suggested that a
+| 4 | TxD | Output | UART data output, TTL level. 1k resistor connected in series inside the module |
-N4007 diode be connected in series if the
+| 5 | SET | Input (10k pullup) | Parameter setting control pin, active low level. 1k resistor connected in series inside the module |
-supply voltage is greater than 4.5V, so as to
+| 6 | ANT | Input/Output | 433MHz antenna pin |
-avoid overheating the onboard LDO regulator
+| 7 | GND | Common ground |
-GND Common ground
+| 8 | GND | Common ground |
-RxD
+| 9 | NC |   | No connection, used in mechanical fixing, compatible with HC-11 module pin position |
-Input
+| ANT1 | ANT | Input/Output | IPEX20279-001E-03 antenna socket |
-(weak pullup)
+| ANT2 | ANT | Input/Output | 433MHz spring antenna solder eyelet |
-UART data input, TTL level. 1k resistor
-connected in series inside the module
-TxD Output UART data output, TTL level. 1k resistor
-connected in series inside the module
-SET
-Input
-(10k pullup)
-Parameter setting control pin, active low
-level. 1k resistor connected in series inside
-the module
-ANT Input/Output 433MHz antenna pin
-GND Common ground
-GND Common ground
-NC
-No connection, used in mechanical fixing,
-compatible with HC-11 module pin position
-ANT1 ANT Input/Output IPEX20279-001E-03 antenna socket
-ANT2 ANT Input/Output 433MHz spring antenna solder eyelet
 Pins 1-6 each have two bonding pads, with the outer half-hole bonding pads
 intended for patch soldering. When the inner bonding pad ANT2 of Pin 6 is used
@@ Line 119: / Line 102: @@
 round-hole bonding pads of Pins 1-5 may then be used to solder a 2.54mm-spacing
 pin header that can be plugged into a PCB socket.
-Wireless Serial Port Transparent Transmission
+=== Wireless Serial Port Transparent Transmission ===
 (1) Simple introduction of working principle
+{{ hc12:hc12configuration.png }}
 As shown in the above diagram, two HC-12 modules can be used in place of
 physical wiring to replace a wired half-duplex serial communications link
@@ Line 130: / Line 117: @@
 half-duplex link is available between modules, as they can not receive and send
 data over the air at the same time.
-(2) Serial port transparent transmission
+=== (2) Serial port transparent transmission ===
 The HC-12 module has four serial port transparent transmission modes, expressed
 as FU1, FU2, FU3, and FU4. In operation, these modes hide all the details of
@@ Line 139: / Line 127: @@
 baud rate. Different modes can not transmit data to each other, and the user
 should select the optimal mode according to practical circumstances.
 The modules are usually operated in pairs, with data transmitted by means of a
 half-duplex link. For successful wireless transmission, the transparent
@@ Line 145: / Line 134: @@
 are: FU3, 9,600bps (8N1: 8 data bits, no parity, 1 stop bit), CH001 (433.4MHz),
 dBm power (100mW).
 The number of bytes that can be continuously sent to the serial port of the
 module is unlimited in modes FU1 and FU3. However, considering ambient
@@ Line 151: / Line 141: @@
 at each end of the link should have some sort of response and resending
 mechanism to avoid information loss.
-(3) The four serial port transparent transmission modes
+=== (3) The four serial port transparent transmission modes ===
 When the HC-12 module leaves the factory, its default serial port transparent
 transmission mode is FU3. In this mode the module remains in full-speed state,
@@ Line 157: / Line 148: @@
 rate of wireless transmission in the air according to the serial port baud rate,
 with the corresponding relationship as shown in the table below:
-Serial port
-baud rate
+|Serial port baud rate |  1200 bps  |  2400 bps  |  4800 bps  |  9600 bps  |  19,200 bps  |  38,400 bps  |  57,600 bps  |  115,200 bps  |
+|Baud rate over the air |  5000bps  ||  15,000bps  ||  58,000bps  ||  236,000bps  ||
-bps
-bps
-bps
-bps
-,200
-bps
-,400
-bps
-,600
-bps
-,200
-bps
-Baud rate in
-the air
-bps 15,000bps 58,000bps 236,000bps
 To get the maximum communication distance, the serial port baud rate should be
 set to be low (1200bps or 2400bps). For short-time transmission of mass data,