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5Pcs Geekcreit® HC-12 433MHz SI4438 Wireless Serial Module Wireless Transceiver Transmission Serial Communication Data Board Remote 1000M

4.4643

$15.99 / $19.51

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$11.99 / $19.51

Shipping to: United States | Express delivery: 7-12 business days | Standard delivery: 15-25 business days

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Rhodd Am Ddim

Rhodd am ddim gydag unrhyw bryniad

Polisi Cludo

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Polisi Dychwelyd

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Rhodd Am Ddim

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Polisi Cludo

Byddwn yn gweithio'n galed i gyflwyno eitemau atoch ar ôl derbyn eich archebion a sicrhau eu bod yn cyrraedd yn ddiogel. Bydd manylion cludo yn cael eu darparu yn eich e-bost cadarnhau.Yn y rhan fwyaf o achosion, mae archebion yn cael eu prosesu o fewn 2 ddiwrnod.O dan amgylchiadau arbennig, bydd yn cael ei oedi fel a ganlyn: Pan fyddwch yn gwneud archeb ar ddydd Sadwrn, dydd Sul neu wyliau cyhoeddus, bydd yn cael ei oedi am 2 ddiwrnod..Yn nodweddiadol, mae angen 5-7 diwrnod gwaith (dydd Llun i ddydd Gwener) heb gael eu heffeithio gan oedi hedfan neu ffactorau amgylcheddol eraill..Gan fod ein gwasanaeth cludo yn fyd-eang, bydd yr amseroedd cludo yn dibynnu ar eich lleoliad, felly gall gymryd ychydig o amser ac, os gwelwch yn dda, aros yn amyneddgar os ydych yn ardaloedd neu wledydd anghysbell.

1. Polisi Dychwelyd a Chyfnewid

Dim ond eitemau a brynwyd ar roymall.com y byddwn yn eu derbyn. Os ydych yn prynu gan ein dosbarthwyr lleol neu fanwerthwyr eraill, ni allwch eu dychwelyd atom ni. Ni fydd eitemau gwerthu terfynol neu roddion am ddim yn cael eu derbyn ar gyfer dychwelyd. I fod yn gymwys i'w dychwelyd, rhaid i'ch eitem fod yn heb ei defnyddio ac yn yr un cyflwr ag yr oedd pan gawsoch hi. Rhaid iddi hefyd fod yn y pecyn gwreiddiol.Ar ôl derbyn cyfarwyddiadau dychwelyd gennym, os gwelwch yn dda, pecynwch eich eitemau a ddychwelwyd a gollwng eich pecyn yn y swyddfa bost leol neu gludwr arall.
Byddwn yn prosesu'ch eitem a ddychwelwyd neu a gyfnewidir o fewn 3-5 diwrnod gwaith ar ôl iddo gyrraedd. Bydd yr ad-daliad yn cael ei brosesu a'i gredyd yn awtomatig i'ch dull talu gwreiddiol.Ni ellir derbyn dychweliadau na chyfnewidiadau os cafodd y cynnyrch ei gynhyrchu'n bersonol, gan gynnwys maint wedi'i gyfaddasu, lliw wedi'i gyfaddasu neu argraff wedi'i gyfaddasu.Angen mwy o help, os gwelwch yn dda, cysylltwch â ni. service@roymall.com neu Whatsapp: +447549870296

2.Polisi Ad-dalu

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Update information: Change chip from SI4463 to SI4438 (Shipped from 11.26.2019)

Note: HC-11 cannot communicate with the HC-12, they work independently, used in pairs.

Features:

1. Supply voltage: 3.2V~5.5V. (If the module you want to work long hours in the emission state, it is recommended that when the supply voltage exceeds 4.5V threaded a 1N4007 diode to prevent module built-in LDO heated)
2. Default address range (open field test): About 600m (maximum communication distance adjustable reach 1000m, the baud rate is 500bps)
3. Default idle current: 16MA (In different working modes operating current is different)
4. Module dimensions: 27.8 x 14.4 x 4mm
5. Operating frequency range: 433.4-473.0MHz, up to 100 channels of communication
6. The maximum transmit power: 100mW (settable)
7. Module support software upgrade
8. Default factory settings: Mode FU3, baud rate is 9600bps, communication channels CH001 (433.4M)
9. Four transparent transmission modes, adapt to different application occasions.

10. Built-in MCU, free of programming, only need to communicate with external devices through the serial port

11. Unlimited number of bytes sent in a single time (FU1 / FU3 mode)

12. The module supports one-to-one, one-to-many, many-to-one, many-to-many connection transparent transmission

Parameter name	Reference	Parameter name	Reference
Model	HC-12	Module size	27.4 x13.2 x 4mm
Frequency Range	433.4 ~ 473.0MHZ	Working frequency	433.4-473.0MHz
Communication Interface	UART 3.3V / 5V TTL level	Antenna interface	Spring antenna / antenna socket
Operating Voltage	3.2-5.5V	Idle current	16mA
Communication level	3.3V / 5V level	Working humidity	10% ~ 90%
Transmit power	20dBm (MAX)	Operating temperature	-25 ° C ~ + 75 ° C
Reference distance	1000m	storage temperature	-40 ° C ~ + 85 ° C

AT command set:

Module parameters, AT command set
AT command is used to set the parameters of the function module and switching modules need to exit the setting mode after setting to take effect. Meanwhile, modify the parameters and functions, power-down is not lost.

Enter the command mode:

The first entry mode - normal use (has the power) in the first 5-pin "SET" is set low;
The second mode of entry - power, 5th pin "SET" again first set low on power.
Both methods can make the module into AT command mode, release ("SET" pin is not connected low) to exit command mode. After the exit command mode, if you change the module function, the function will be cut to the appropriate state.
The second way is fixed in serial format 9600, N, 1 into the AT.

Instructions:

1. AT
Test instructions
Example: Send module commands "AT", the module returns "OK".

2. AT + Bxxxx
Change the serial port baud rate command. You can set the baud rate is 1200bps, 2400bps, 4800bps, 9600bps, 19200bps, 38400bps, 57600bps and 115200bps. The factory default is 9600bps.
Example: Set the module serial port baud rate is 19200bps, please send module command "AT + B19200", the module returns
"OK + B19200".

3. AT + Cxxx
Change the wireless communication channel, selectable from 001 to 127 (more than 100 radio channels after the communication distance not guaranteed). The default value is 001 radio channels, operating frequency is 433.4MHz. Step channel is 400KHz, the operating frequency of the channel 100 is 473.0 MHz.

Example:
Set module to channel 21, please send module command "AT + C021", the module returns "OK + C021".
After exiting the command mode, the module in the first 21 channels, operating frequency is 441.4 MHz.
Note: Because the wireless receiver module sensitivity HC-12 is relatively high, the baud rate is greater than when air 58000 bps, 5 must be shifted to the adjacent channel use. When the air baud rate is not greater than 58000 bps, if the short distance (10 meters) communication, but also need to stagger five adjacent channel use.

4. AT + FUx

Change the module serial pass-through mode, there FU1, FU2 and FU3 three modes. Module default mode is FU3, two serial pass-through mode module must be set to the same communication. See detailed above, "wireless serial pass-through" part.
Example: Send module commands "AT + FU1", the module returns "AT + OK".

5. AT + Px

The default setting is 8, maximum transmit power, communication distances. Transmit power level is set to 1, the minimum transmission power. In general, the transmission power of each drop 6dB, communication distance will be reduced by half.
Example: Send module commands "AT + P 5", the module returns "OK + P5". After exiting the command mode, the module transmit power is +11 dBm.

Four transparent transmission modes of the module:

The HC-12 module has four serial port transparent transmission modes denoted by FU1, FU2, FU3 and FU4. When using each mode, all you need to do is to send and receive serial data. You do not need to control the wireless transmission part in the air, but you can only communicate with each other at the same air baud rate!

FU1: (send AT + FU1 in more power-saving mode) The idle working current of the module is about 3.6mA. In this mode, 8 kinds of serial port baud rates can be set, and the air baud rate is unified to 250000bps

FU2: (send AT + FU2 in power saving mode) The idle working current of the module is about 80uA. Under the mode, the module only supports the serial baud rate of 1200bps, 2400bps and 4800bps, and the air baud rate is unified to 250000bps

FU3: (send AT + FU3 in full speed mode (factory default)) The idle working current of the module is about 16mA. The module will automatically adjust the wireless transmission air baud rate according to the serial port baud rate

FU4: (Send AT + FU4 in longer distance mode) The idle working current of the module is about 16mA, the serial port baud rate is fixed at 1200bps, and the air baud rate is 500bps

Number	AT command (x means parameter)	Response	Effect
1	AT	OK	Check whether the module is normal
2	AT+Bxxxx	OK+Bxxxx	Change the serial port baud rate
3	AT+Cxxxx	OKsetname	Change the channel of wireless communication
4	AT+FUx	OK+FUx	Change the module serial port transparent transmission mode
5	AT+Px	OK+Px	Set the module"s transmit power level
6	AT+Ry	OK + (parameter specified by y)	Get the individual parameters of the module
7	AT+RX	OK + various parameters	Get all parameters of the module
9	AT+V	www.hc01.com HC-12_V2.6	Query module firmware version information
10	AT+SLEEP	OK+SLEEP	Enter sleep mode
11	AT+DEFAULT	OK+SLEEP	Reset

Package included:

5 x HC-12 module

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A part of the review has been auto-translated.

studio.ciodo VIP2
IT

23/05/2017

i already use this module to communicate more arduinos togheter, the interface is simple and with perfect line of sight i can communicate with included antenna for around 1.5Km. using internal in a house is perfect for this and with hight baudrate bidirectional. for external usage is good but data trasmitted is low and latency is around 2 seconds, really useful to lanch command to a remote machine.
some useful information and command can be found here
https://www.elecrow.com/download/HC-12.pdf
http://avrproject.ru/112/rf_hc12/2016-01-14_122335_HC-12_v2.3B.pdf
attached here is some test of distance

i already use this module to communicate more arduinos togheter, the interface is simple and with perfect line of sight i can communicate with included antenna for around 1.5Km. using internal in a house is perfect for this and with hight baudrate bidirectional. for external usage is good but data trasmitted is low and latency is around 2 seconds, really useful to lanch command to a remote machine.
some useful information and command can be found here
https://www.elecrow.com/download/HC-12.pdf
http://avrproject.ru/112/rf_hc12/2016-01-14_122335_HC-12_v2.3B.pdf
attached here is some test of distance

i already use this module to communicate more arduinos togheter, the interface is simple and with perfect line of sight i can communicate with included antenna for around 1.5Km. using internal in a house is perfect for this and with hight baudrate bidirectional. for external usage is good but data trasmitted is low and latency is around 2 seconds, really useful to lanch command to a remote machine.
some useful information and command can be found here
https://www.elecrow.com/download/HC-12.pdf
http://avrproject.ru/112/rf_hc12/2016-01-14_122335_HC-12_v2.3B.pdf
attached here is some test of distance

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robertorce VIP3
IT
20/04/2021

tempi di poco piu lunghi del solito causa covid ma come sempre accettabilissimi
tutto come da descrizione peccato non sia presente una fila di contatti per il resto ottimo

times of little longer than usual cause covid but as always very acceptable
all as per description sin is not present a row of contacts for the rest excellent

times of little longer than usual cause covid but as always very acceptable
all as per description sin is not present a row of contacts for the rest excellent
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