System and method for measuring electrical energy with functions of pre-pay and data collection by means of an optical device

An electric power measuring method with functions of prepayment, data collection and remote firmware updating through an optical device, that comprises the following steps:

• a) Place the recharging optical device over the point of sale recharging module;
• b) identify the recharging optical device using an electric power sale software in the personal computer through a defined protocol;
• c) send, through a remote commtnication network, the electric power sell request to the server where the management software resides with the electric power amount requested by the user, as well as the identification information of the recharging optical device and its associated electronic meter;
• d) generate end send from the management software residing in the server an encrypted data packet using a unique encryption key for the associated prepayment electronic meter, which contains the credit balance recharge direction according to the requested amount;
• e) receive and record, in the recharging optical device, the encrypted data packets through the point of sale recharging module;
• f) send the encrypted data packets to the electric power prepayment electronic meter through a defined protocol upon placing the associated recharging optical device in the communication through optical port block of the electronic meter and pressing the pressure switch from the recharging optical device;
• g) decrypting the received data packets through a unique encryption key and add the received prepaid credit balance if the result of the decryption process is correct.