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Module de port série sans fil LoRa
Module de port série sans fil LoRa
Module de port série sans fil LoRa
Module de port série sans fil LoRa
Module de port série sans fil LoRa
Module de port série sans fil LoRa
EWM22M-400T22S 433MHz Module de port série sans fil LoRa Entièrement compatible avec les modules E22 Prise en charge de la mise en réseau automatique des relais

[Solution de puce]： LoRa

[Fréquence]： 410,125-493,125 MHz

[Puissance d’émission]：22 dBm

[Distance de communication]： 5 km

[Dimensions]：14 x 20 mm

[Poids]： 1,95 ± 0,05 g

[Introduction]：The EWM22M-400T22S is an ultra-small, low-cost wireless serial port module (UART) with multiple transmission modes. It utilizes LoRa communication technology, which is fully compatible with the E22. It has a maximum transmit power of 22dBm and operates in the 400 frequency band. It utilizes LoRa spread spectrum technology, TTL level output, and is compatible with 3.3V IO port voltage. This LoRa module offers faster speeds, lower power consumption, and a smaller size. Custom development services are also available.

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PIN
Pin number Pin Name Pin direction Pin Purpose
1 GND - Module ground wire
2 NC - Empty foot (not open for use, users do not need to care)
3 GND - Module ground wire
4 GND - Module ground wire
5 TX_EN Output Used with RX_EN to control external PA; leave it unconnected if not used.
6 RX_EN Output Used with TX_EN to control external PA; leave it unconnected if not used.
7 CLK - SWCLK Clock pin when program is loaded (suspended, user does not need to connect)
8 PART - SWDIO data pin when the program is loaded (suspended, no need to connect to the user)
9 NC - Empty foot (not open for use, users do not need to care)
10 NC - Empty foot (not open for use, users do not need to care)
11 NC - Empty foot (not open for use, users do not need to care)
12 NC - Empty foot (not open for use, users do not need to care)
13 GND - Module ground wire
14 VCC - Module power positive reference, voltage range: 2.7～5.5V DC
15 TXD Output TTL serial port output, connected to the external RXD output pin;
16 RXD input TTL serial port input, connected to external TXD output pin;
17 M1 Input (very weak pull-up) Cooperate with M0 to determine the 4 working modes of the module (cannot be left floating, can be grounded if not used)
18 M0 Input (very weak pull-up) Cooperate with M1 to determine the 4 working modes of the module (cannot be left floating, can be grounded if not used)
19 TO Output Used to indicate the working status of the module; the user wakes up the external MCU, and outputs a low level during the power-on self-test initialization period; (can be left floating)
20 NC - Empty foot (not open for use, users do not need to care)
21 RESET input Module reset pin, low level reset.
22 GND - Module ground wire
23 ON - Antenna interface (high frequency signal output, 50 ohm characteristic impedance)
24 GND - Module ground wire