Sonsivri
 
*
Welcome, Guest. Please login or register.
Did you miss your activation email?
November 20, 2017, 10:11:52 22:11


Login with username, password and session length


Pages: [1]
Print
Author Topic: Problem SIM800L  (Read 671 times)
0 Members and 1 Guest are viewing this topic.
beto333
Inactive

 Warned
Offline Offline

Posts: 6

Thank You
-Given: 5
-Receive: 0


« on: November 12, 2017, 03:27:45 15:27 »

Problems connecting to the network with SIM 800L module that resets some hint?
Logged
zawmintun1
Active Member
***
Offline Offline

Posts: 125

Thank You
-Given: 624
-Receive: 24


« Reply #1 on: November 12, 2017, 03:46:58 15:46 »

Connect power supply with 3.8V-4.2V,2A is important and it will automatically connect to network if you inserted your SIM card.
Logged
beto333
Inactive

 Warned
Offline Offline

Posts: 6

Thank You
-Given: 5
-Receive: 0


« Reply #2 on: November 12, 2017, 04:30:47 16:30 »

Thank you for the reply
the sim card was inserted after several minutes of testing hooks up the network and stays connected for several minutes but after switching off the system returns to having problems

Posted on: November 12, 2017, 04:17:53 16:17 - Automerged

this and the scheme


Logged
beto333
Inactive

 Warned
Offline Offline

Posts: 6

Thank You
-Given: 5
-Receive: 0


« Reply #3 on: November 12, 2017, 08:21:20 20:21 »

thank you very much
  but I'm afraid the problem is the battery voltage as zawmintun1 writes and a bit to the limit
Logged
iot
Newbie
*
Offline Offline

Posts: 22

Thank You
-Given: 31
-Receive: 13


« Reply #4 on: November 13, 2017, 03:20:35 03:20 »

Does your power supply provides enough current (including spikes) to the comm module?
Logged
kukumar
Junior Member
**
Offline Offline

Posts: 43

Thank You
-Given: 21
-Receive: 28


« Reply #5 on: November 13, 2017, 02:41:20 14:41 »

The power supply range of SIM800 is from 3.4V to 4.4V. Recommended voltage is 4.0V. The transmitting
burst will cause voltage drop and the power supply must be able to provide sufficient current up to 2A. For the
VBAT input, a bypass capacitor (low ESR) such as a 100 μF.(I use 100uF tantalum and  470uF elco)
For the VBAT input, a 100uF Tantalum capacitor (CA low ESR) and a 1uF~10uF Ceramics capacitor
and 33pF and 10pF capacitors can effectively eliminate the high frequency
interference. A 5.1V/500mW Zener diode is strongly recommended, the diode can prevent chip from damaging
by the voltage surge. These capacitors and Zener diode should be placed as close as possible to SIM800

I have no problems after adding this capacitors.
Logged
medik
Junior Member
**
Offline Offline

Posts: 36

Thank You
-Given: 68
-Receive: 2


« Reply #6 on: November 16, 2017, 09:48:12 21:48 »

The SIM800L module requires strict power supply voltage level and current capacity. It is safer never to exceed 4.2V and prevent going below 3.6V from experience.
You can power with a 5V 2A SMPS but you would want to scale down the voltage by adjusting the reference voltage to the shunt regulator. Or simply use a lithium battery.
Logged
PICker
Junior Member
**
Offline Offline

Posts: 93

Thank You
-Given: 64
-Receive: 50


« Reply #7 on: November 17, 2017, 07:54:03 07:54 »

Please, read the content of this link:
http://www.raviyp.com/embedded/203-sim900-sim800-not-working-possible-reasons
Logged
beto333
Inactive

 Warned
Offline Offline

Posts: 6

Thank You
-Given: 5
-Receive: 0


« Reply #8 on: November 17, 2017, 11:24:03 23:24 »

thanks for the link PICker  I read it and do some tests   Smiley
Logged
Pages: [1]
Print
Jump to:  


DISCLAIMER
WE DONT HOST ANY ILLEGAL FILES ON THE SERVER
USE CONTACT US TO REPORT ILLEGAL FILES
ADMINISTRATORS CANNOT BE HELD RESPONSIBLE FOR USERS POSTS AND LINKS

... Copyright 2003-2999 Sonsivri.to ...
Powered by SMF 1.1.18 | SMF © 2006-2009, Simple Machines LLC | HarzeM Dilber MC