TechnoElectronics44

GSM-SIM800L

SIM800L GSM/GPRS module is a miniature GSM module, You can use this module to design a simple Mobile to perform SMS text messages, make or receive phone calls, connecting to the internet through GPRS and TCP/IP. Sim800L module supports quad-band GSM/GPRS network, it works pretty much anywhere in the world and it supports the Micro SIM card.

Model number: SIM800L

Other names: GSM modem, GSM module

Other related devices: SIM900A, SIM800A, A6 GPRS GSM Module

GSM-SIM800L

Advantages

SIM800L is small in size and it supports Micro SIM card
Sim800L module supports quad-band GSM/GPRS network

Pin Configuration

Pin Name	Pin Description
NET	Helical Antenna interface
VCC	Power supply(3.4v - 4.4v)
RST	Hard RESET pin, pull this pin low for 100ms to perform a hard reset.
RX	Serial Communication – Data Receiving pin
TX	Serial Communication – Data Transmitting pin
GND	GND connection
SPK-	Differential Speaker Positive Terminal
SPK+	Differential Speaker Negative Terminal
MIC-	Differential microphone Negative pin
MIC+	Differential microphone Positive pin
DTR	Pin activates/deactivates sleep mode. Pulling it HIGH will put the module in sleep mode, disabling serial communication. Pulling it LOW will wake the module up
RING	The pin acts as a Ring Indicator. It is basically the ‘interrupt’ out pin from the module. It is by default high and will pulse low for 120ms when a call is received. It can also be configured to pulse when an SMS is received.

Technical Specifications

Power supply: 3.3v to 4.4v

Current Required: 1A – 2.5 A

BandFrequency:QuadBand(GSM-50,EGSM850,DCS1800,PCS1900)

Baud rate: 9600 bps

Sim: Micro sim

Temparature Range: -40 ̊ C to +80 ̊̊ C

Data GPRS: GPRS Data Downlink Transfer: max 85.6 kbps

GPRS Data Uplink Transfer: max 85.6 kbps

SMS storage: SIM card

Real Time clock: Support RTC

Firmware upgrade: Serial port or USB port

How to use SIM800L

GSM-Sim800L can be tested by using “AT” commands,

insert the micro-SIM card as shown below

GSM SIM800L,GSM,SIM800L,TechnoElectronics44

GSM-SIM800L signal Light indication

1. Initially the signal light will blink continuously every second there is no network connection.

2. After a certain time when it receives the signal the light blinks every 3 seconds means GSM is ready for calls and messages.
3. Otherwise we request data mode, so signal-light will blink every 2 seconds.

every 1-second

GSM-SIM800L without network signal-LED blinks every one second

every 3-second
GSM-SIM800L with network signal-LED blinks every three second

USB-TTL(CP210X) interface with GSM

Download driver software CP210X Download Flash Magic

1. Install driver software CP210X, communication between GSM and computer

CP210X-Chip

2. Find the comport number on the computer

Ex: my computer->devicemanager->ports->com6)

Check the COMPORT number

3. Connect the GSM module with the computer by using a USB-TTL converter

4. Install the Flash-Magic Tool

5. Open the Flash-Magic Tool and set the com port, baud rate.

And enter the “AT” commands

FlashMagic Tool

SIM800L testing Using “AT” commands

AT: Ok

ATD: Dail a call

ATH: Hang up the call

AT+CMGF=1 (set the sim800L in text message mode)

AT+CMGR=2(Read the message at second place)

AT+CMGD=1,4 (Delete all messages)

AT+CMGD= N(enter a number 'N' to delete message number)

Ex: AT+CMGD=2 (Delete the second message in the Simcard)

AT+CMGS=+ZZxxxxxxxxxx(Enter mobile number-message sending to the phone number)

AT+CNMI=2,1,0,0,0 (New SMS Message Indications)

AT+CMGL="ALL"(Read the specified type of all messages)

FlashMagic-GSM

GSM SIM800L interface with Arduino

GSM SIM800L TX – Arduino 8(Rx)
GSM SIM800L RX – Arduino 9(Tx)
GSM SIM800L GND – Atrduino GND

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