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USER MANUAL  ELDES ESIM021  V1.1                                     

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Limited Liability

The buyer must agree that the system will reduce the risk of fire, theft, burglary or other dangers but does not guarantee against 

such events.

“ELDES UAB” will not take any responsibility regarding personal or property or revenue loss while using the system.

“ELDES UAB” liability according to local laws does not exceed value of the purchased system. “ELDES UAB” is not affiliated with any of 

the cellular providers therefore is not responsible for the quality of cellular service.

Manufacturer Warranty

The system carries a 24-month warranty by the manufacturer “ELDES UAB”. Warranty period starts from the day the system has been 

purchased by the end user. The warranty is valid only if the system has been used as intended, following all guidelines listed in the 

manual and within specified operating conditions. Receipt must be kept as a proof of purchase date.

The warranty is voided if the system has been exposed to mechanical impact, chemicals, high humidity, fluids, corrosive and hazar

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dous environment or other force majeure factors.

Package content:

1. ELDES ESIM021 ............................................qty. 1

2. ESIM021 User Manual...... .........................qty. 1

About User Manual

This document describes GSM security and control system ESIM021, it‘s installation and operation. It is very important to read User Manual 

before start using the system.

1. General Information

1.1 Function

ESIM021 is a microcontroller based device used to inform users about the alarm in automatic or security systems and control one electric 

appliance – open collector.

1.2  Operation description

The GSM security and control system ESIM021 uses the GSM network for transmission of inputs (alarms generated by one of the system 

zones) to authorised users. In addition to being informed about triggers/resets of the inputs, the users can manage the system and use the 

system to control one electronic device.

The system has two digital inputs (normally open) called Zone1 and Zone2. ESIM021 can also control 1 electronic device (using an open 

collector) on receipt of the correct SMS text message from one of the authorised users. For example, users can turn on or off the heating, 

lighting, lift the gates, blinds etc. The system remembers the output setting if there is a temporary electricity failure. Once initialised, ESIM021 

will function 24/7.

When an authorised number calls to the system, the device answers and the user can listen for 2 minutes to what is going on in the premises. 

This function works only when a microphone is connected. This microphone does not include into standard package content. The system 

will ignore SMS requests and voice calls coming from unknown telephone numbers. Users can be informed about triggered/reset inputs by 

SMS (see chapter 1.2.4) or CALL methods (see chapter 1.2.5). Users also can enable and disable either input (see chapter 2.2).

Any number format can be used, for e37011111111, 861111111 or even short numbers like 111. International numbers must 

be entered with „+“ or „00“.

1.2.1 Entering users on the SIM card using a mobile phone

The SIM card should be inserted into the phone. The two user numbers must be entered into the SIM card memory under the names “User1” 

and “User2”. These should be entered into the SIM phone book in your mobile phone. It is also possible to enter User1 only. Then the SIM card 

should be inserted into the ESIM021.

1.2.2 Entering user by phone call to the system

The SIM card should be inserted into the ESIM021. When ESIM021 starts it looks for User1 and User2 names in the SIM card memory. If the 

system can‘t find any of these users, it waits for a phone call, answers the call and saves the phone number as User1.

NOTE: 

with this type of setup, only User1 can be entered.

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