PDV offline: como um caixa continua vendendo quando a internet cai

Internet down during peak sales time caused a dilemma for retail employees who had full carts but couldn't complete purchases. The ERPPro solution was to implement an optional offline PDV that could work independently on each cash register. In this post, the author explains how it works and the decisions made.

The key issue is that a cloud-based system requires connectivity to record sales. However, the cash register can't stop selling because the internet connection failed. The solution was to separate two functions: recording the sale and sending the sale data to the server.

First, the cash register needs to open the PDV at least once with internet access. At this point, it downloads a copy of products and prices. A computer that has never been connected to the internet cannot sell offline. In the case of a queue, each sale is saved directly on the computer, forming a queue. When the internet is back, this queue is sent, and the system updates inventory and finances without duplicating sales.

What works offline and what doesn't were carefully chosen to cover only the part that stops the queue - normal cash register sales. Changes, pre-sales, registrations, finances, and reports still need connectivity. A smaller scope makes synchronization simpler and more secure. PDV offline doesn't handle NFC-e contingency. While it records sales, the NFC-e contingency takes care of issuing the tax receipt without internet connection.

The explanation includes frequently asked questions about how the offline PDV works. It is recommended for stores with unstable internet or when the cash register becomes a bottleneck. During peak hours, the cash register often becomes a bottleneck. This solution is useful for convenience stores and high turnover shops. To read the complete explanation with FAQs, visit the PDV offline system page of ERPPro.

The question remains for readers: How does your system avoid duplicate sales when the offline queue synchronizes?