Differences
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manual [2020/11/30 19:19] bgfdsuperadmin |
manual [2020/11/30 19:57] bgfdsuperadmin |
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| //Edited by Bluegoldfishdesign 20-Nov-20// | //Edited by Bluegoldfishdesign 20-Nov-20// | ||
| - | {{ https://www.allaboutcircuits.com/ | + | {{ hc12:hc12pcb.png }} |
| - | {{ wiki: | + | |
| === Product Applications === | === Product Applications === | ||
| * Wireless sensor | * Wireless sensor | ||
| Line 77: | Line 77: | ||
| === Product Dimensions === | === 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 | 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 | 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 | total, and one RF antenna socket (ANT1), with definitions as shown in the table | ||
| below: | below: | ||
| - | Pin Definition I/O direction Notes | + | |
| - | 1 Vcc | + | ^ Pin ^ Definition |
| - | Power supply input, DC3.2V-5.5V, | + | | 1 | Vcc | | Power supply input, DC3.2V-5.5V, |
| - | capacity not less than 200mA. Note: if the | + | | 2 | GND | | Common ground |
| - | module is working in the transmitting state | + | | 3 | RxD | Input (weak pullup) |
| - | for an extended time, it is suggested that a | + | | 4 | TxD | Output |
| - | 1N4007 diode be connected in series if the | + | | 5 | SET | Input (10k pullup) |
| - | supply voltage is greater than 4.5V, so as to | + | | 6 | ANT | Input/ |
| - | avoid overheating the onboard LDO regulator | + | | 7 | GND | Common ground |
| - | 2 GND Common ground | + | | 8 | GND | Common ground |
| - | 3 RxD | + | | 9 | NC | |
| - | Input | + | | ANT1 | ANT | Input/ |
| - | (weak pullup) | + | | ANT2 | ANT | Input/ |
| - | UART data input, TTL level. 1k resistor | + | |
| - | connected in series inside the module | + | |
| - | 4 TxD Output UART data output, TTL level. 1k resistor | + | |
| - | connected in series inside the module | + | |
| - | 5 SET | + | |
| - | Input | + | |
| - | (10k pullup) | + | |
| - | Parameter setting control pin, active low | + | |
| - | level. 1k resistor connected in series inside | + | |
| - | the module | + | |
| - | 6 ANT Input/ | + | |
| - | 7 GND Common ground | + | |
| - | 8 GND Common ground | + | |
| - | 9 NC | + | |
| - | No connection, used in mechanical fixing, | + | |
| - | compatible with HC-11 module pin position | + | |
| - | ANT1 ANT Input/ | + | |
| - | ANT2 ANT Input/ | + | |
| Pins 1-6 each have two bonding pads, with the outer half-hole bonding pads | 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 | 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 | 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. | 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 | (1) Simple introduction of working principle | ||
| + | |||
| As shown in the above diagram, two HC-12 modules can be used in place of | 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 | physical wiring to replace a wired half-duplex serial communications link | ||