Payment docking scheme of ordering machine: scanning code, brushing face and aggregating payment details | QUNMAO Qunmao

Introduction: Why should the payment for the ordering machine be settled before it goes online?

Many stores focus on the screen size, appearance and price when purchasing ordering machines. Only at the installation and debugging stage do they find that the payment has not been clearly thought out: the merchant number has not been opened, the concept of face brushing sounds very new but there is no preparation for compliance, the customer withheld the money but did not issue the ticket, and the channel bill and ordering order were several times different during the evening reconciliation. These problems are not big in isolation, and when superimposed on the peak of business, they will become the burden of queuing, complaints and manual checking.

Payment is the only part of the ordering process that involves funds, and it is also the part where stores are least willing to make mistakes. The payment method, docking path, exception handling and reconciliation method are determined together in the early stage of the project, which can make the subsequent equipment deployment, software launch and store training much smoother.

QUNMAOIt is the LCD commercial display OEM/ODM source factory under Shenzhen qunmao display technology co., ltd. the ordering machine can be customized according to the project from the whole machine structure, peripheral module to ordering software. This means that the hardware configuration, interface process and docking method related to payment can be designed together in the scheme stage, rather than being remedied after the equipment arrives. If you don't know the overall configuration of the ordering machine, it is recommended to know it first.Self-service ordering machine products; Has determined the procurement, care about landing rhythm, can be combinedSelf-service ordering machine store deployment guideLook together.

Panorama of Catering Payment Methods

At present, there are five common collection methods in catering stores: WeChat payment, Alipay, cloud flash payment and bank card, aggregate collection, and brush face payment. They have different requirements for terminals, docking paths and suitable store types.

The opening of payment methods such as digital RMB depends on the region and acquiring channel, and can be confirmed with the payment service provider in the early stage of the project.

Payment related configuration of QUNMAO ordering machine

The capabilities of the terminal determine which payment methods can be received. The following are the payment-related configurations in the QUNMAO ordering machine specifications. The commonalities and differences of the four models are listed together:

In addition, the whole machine is pre-installed with Windows 10/11, which supports the installation of third-party software and self-starting. QUNMAO also supports the customization of ordering software. Stores can not only use QUNMAO's ordering software, but also customize the payment process according to their own cash register and member system requirements. Stores that need to use cash register equipment with ordering terminals can be further understood.POS terminalwithCashier Solution。

What kind of payment combination to choose is also related to the store format. Fast food and tea are mainly used to scan codes. Shopping malls and restaurants often have to take into account cloud flash payment and bank cards. Chain brands pay more attention to unified reconciliation. How to choose an ordering machine in different formats can be referred.Fast food restaurant, dinner, milk tea shop ordering machine how to choose; What is the difference between the ordering machine in the payment process compared with the scanning code ordering can be seen.Which is better, self-service ordering machine or scanning code ordering?. Tea, baking and other stalls with small high-frequency orders can be matched with desktop ordering all-in-one machine and digital menu board, for reference.Milk Tea Shop, Coffee Shop & Restaurant Desktop Digital Menu BoardandDesktop digital menu board/desktop ordering all-in-one machine, and the vertical ordering machine forms a complete closed loop of ordering-paying-serving.

Sweep Code Payment Docking: Swept and Main Sweep

Sweep code payment is currently the most mainstream collection method for ordering machines. WeChat and Alipay both provide mature interfaces. The scanning payment on the ordering machine is divided into two types: the scanned and the main scanning, with different business processes and docking priorities.

Swept: The terminal sweeps the customer's payment code.

The customer opens the payment code of WeChat or Alipay on the mobile phone, points at the code scanning window of the ordering machine, the terminal reads the payment code and calls the payment interface for deduction, and the order status is updated and the receipt is printed after the deduction result is returned. The advantage of this method is that customers do not need to turn on the camera, do not need to manually enter the amount, the operation steps are few, in the fast food store peak is very common.

In the process of being scanned, the recognition speed of the code scanning module and the adaptability to the brightness of the mobile phone screen and the film sticking are very important. The code scanning module of the QUNMAO ordering machine is integrated in the body, and the position is fixed and the alignment is convenient. Customers do not need to find the code scanning position.

Main scan: customers scan the two-dimensional code on the terminal screen

After confirming the order, the terminal generates a two-dimensional code bound to the order on the screen. The customer scans WeChat or Alipay to complete the payment, and the terminal confirms the order status through the payment result notification or active check-up. This method does not rely on scanning hardware, but also applies to the customer's mobile phone is not convenient to show the payment code.

The focus of the main scan is the binding of the order and the two-dimensional code, the setting of the validity period, and the confirmation mechanism of the payment result. When the design is not good, it is easy to appear that the customer has paid but the terminal has not updated the status in time. This kind of problem is explained in detail in the "payment exception handling" later.

Technical points of docking

Merchant configuration and application information

Before docking, it is necessary to confirm the basic configuration such as merchant number, application identification, key and certificate, callback address, etc. For multi-store brands, it is also necessary to determine the merchant system of store dimensions to avoid the inability to distinguish stores during subsequent reconciliation.

Order Number and Idempotent Design

Each payment order must have a globally unique order number. When payment requests are repeatedly submitted for the same order, the system should be able to identify and return the same result to avoid repeated deductions.

Signature and verification

Both requests and callbacks require signature verification to prevent data tampering or forgery of callbacks. The key is recommended to be kept at the server and not stored in clear text on the terminal.

Amount and Unit

The unit, decimal place and actual amount paid after discount should be consistent with the ordering system, and the amount at the time of refund should also correspond to the original amount paid.

Timeout and Status Query

The time for the terminal to wait for the payment result should be clearly set. After the timeout, the failure cannot be directly determined. Instead, the terminal should check the order before processing. This will be expanded in the exception processing section.

Docking Path: Software Customization According to Store Process

QUNMAO supports customization of ordering software. Stores can customize the corresponding payment process and interface in ordering software according to their own payment channels, membership system and cash register process. Customers who already have a mature cash register system can also deploy their own programs in the Windows 10/11 environment, and QUNMAO will cooperate to complete peripheral debugging. Both paths use the same set of hardware platforms, and there is no need to re-evaluate the equipment for payment methods.

Face-to-Face Payment: Equipment Conditions and Compliance Points

Brush face payment saves the step of "taking out the mobile phone", and customers pay after facing the camera to complete the identification. Its experience is very intuitive, but if the store only sees convenience and ignores the equipment conditions and compliance requirements, it is easy to encounter troubles in the later period.

The basic process of brush face payment.

After confirming the order, the customer chooses to brush the face for payment. The terminal camera collects the face image, compares it with the identity information of the payment platform after living body detection, completes the deduction after the comparison passes, and returns the payment result. The whole process depends on the imaging quality of the camera, the light condition and the recognition service on the platform side.

Equipment Conditions: You can brush your face to pay instead of installing a camera.

WeChat payment and Alipay's face-brushing payment are both carried out through their respective authorized service provider systems. The equipment needs to use the face-brushing module approved by the platform and complete the access, instead of installing a camera on the ordering machine to use it directly. The QUNMAO ordering machine specification lists a 5MP camera (optional, supporting face recognition), which provides a hardware basis for the face brushing scheme. In specific projects, QUNMAO can customize the integration and software docking of the face brushing module according to requirements, and stores need to obtain the service provider authorization of the selected payment platform simultaneously.

Therefore, three things should be confirmed in the scheme stage: which platform to choose, who provides the module and who is the authorized service provider. After these three things are determined, equipment selection and software customization have a clear basis.

Key points of compliance

Face information is sensitive personal information. On March 21, 2025, the State Internet Information Office and the Ministry of Public Security announced the "measures for the Security Management of the Application of face Recognition Technology", which will come into effect on June 1, 2025. Together with the "personal Information Protection Law", it constitutes the main rules that need to be paid attention to when face-brushing payment falls on the ground. In conjunction with these regulations, stores should pay attention to the following points:

The above contents are arranged according to the documents published by the National Network Information Office. Before the actual deployment of the store, it is suggested to confirm it in combination with the regulatory requirements of the region and its own legal opinions.

Landing recommendations

In combination with the actual conditions of equipment and compliance, QUNMAO suggested that stores should use face-brushing payment as an alternative method instead of the only entrance: code-scanning payment should remain the main process, and face-brushing should provide faster choices for members and high-frequency customers; There should be a clear notification copy and consent to operation on the screen. Do field tests under different light conditions to confirm that the recognition success rate meets the peak demand of stores before expanding the use.

Aggregate payment: one-yard multi-payment and unified reconciliation.

What is Aggregate Payment

Aggregate payment is through an interface or a two-dimensional code, covering WeChat, Alipay, cloud flash payment and other channels, by the acquiring agency or service provider in the background unified processing of fund clearing and channel docking. For stores, the terminal only needs to be docked once to support multiple channels, reducing the work of opening and maintaining multiple channels separately.

How to choose direct connection channel and aggregate payment

Unified payment system for multi-store chain

Chain brands often have direct stores and franchise stores co-exist, the flow of funds, accounting methods and reconciliation dimensions vary. Ordering software needs to bring store, terminal and channel information to the order, so that reconciliation data can be issued by store, time period and channel. QUNMAO supports ordering software customization, and can design order fields and reconciliation reports according to the brand's merchant system and division rules. For brands that require batch settlement and unified reconciliation for multiple stores and multiple stalls, please referCanteen self-service ordering machine solutionwithFast food restaurant self-service ordering machine solution, put vertical ordering, desktop cashier and background report in the same system for planning. The overall selection of ordering software can be further understood.Supporting Scheme of Cashier and Ordering System。

Payment Security: Transaction Encryption and Refund Process

Security measures at the transaction level

• Transmission encryption:Communication between the terminal and the payment service uses encrypted transmission to avoid interception of transaction data in the network.
• Signature and verification:Both requests and callbacks need to be signed to prevent forgery of orders or tampering with amounts.
• Key management:The key and certificate are kept on the server, and the terminal only retains the minimum information required for the call, and the unidentified text is stored.
• sensitive information does not land:Sensitive information such as bank card number is not stored in the terminal, and the payment code is invalid when it is used up.
• Operation marks:Record the operator, time and order number of key operations such as payment and refund, which is convenient for tracing afterwards.

Protection at the terminal level

Payment security is also reflected in the device itself. The QUNMAO ordering machine body is reserved for maintenance door locks, which need to be opened when maintaining the power supply and circuit board to avoid direct contact with internal components. The whole machine is pre-installed with Windows 10/11, which can combine the system account authority, peripheral access restriction and program startup self-starting, so that the terminal can only run the ordering and payment programs. Remote monitoring, equipment status and software update management methods, you can referSelf-service terminal solution。

Refund process

Refund is a necessary link in the daily operation of the ordering machine. Several issues need to be considered when designing:

• Who can initiate:Refund authority should be limited to store managers or designated positions, and authority verification is required.
• How to return:Full and partial refunds are supported, and the refund amount cannot exceed the original payment amount.
• Where to return:Return the original route to the payment channel, and the refund result shall be subject to the channel return.
• how to leave evidence:The refund voucher is printed by 80mm thermal printer, and the order number, refund amount, time and handling person are recorded together.
• How to reconcile:Refund data is synchronized into the daily settlement report and checked with the channel bill.

Payment exception handling: order drop, overtime and repeated deduction

What bothers the store most about the payment of the ordering machine is not the conventional success or failure, but the "uncertain status": the customer said that the money was deducted, but there was no money in the order. The terminal prompt failed, but the channel bill showed success. The following is a table of common phenomena and a description of the design ideas behind it.

Design Ideas of Anti-drop Orders

The core of exception handling is "don't draw conclusions based on the terminal's own judgment". The payment result shall be subject to the payment channel. The terminal shall take the initiative to check the order before closing the order regardless of whether it receives the notice or not. For orders that have not been confirmed for a long time, regular tasks will continue to check the order until a clear result is obtained. All status changes are logged for later verification. These logics can be written into the process when the ordering software is customized. QUNMAO will design the corresponding supplement and refund rules according to the order process and payment channel of the store.

Faults at the equipment level, such as touch, paper jam and unstable network, will also affect the payment experience. Troubleshooting in daily use can be checked item by item in combination with the fuselage maintenance door lock, thermal printer and network settings.

Reconciliation with cash register system and back office

Three Levels of Reconciliation

Common differences and treatment

三方数据不一致的原因通常集中在几类：渠道手续费造成的到账金额差异、退款的时间差、跨日订单的归属、异常订单（掉单、补单）的状态变化。点餐软件如果能在订单中保留渠道流水号、支付时间和状态变更记录，对账时就可以按流水号逐笔核对，缩短排查时间。

与现有收银系统的数据对接

已有收银系统的门店，需要把点餐机的订单和支付数据同步到收银系统，常见的方式是由点餐软件通过接口推送，或由收银系统定时拉取。QUNMAO支持软件定制，可以按收银系统提供的接口规范调整数据格式与同步频率；需要把前台收银设备和点餐机一起规划的门店，可以参考Cashier SolutionwithDesktop cash register。取餐叫号环节需要和支付状态衔接的，可以结合Queue calling machineandSolution of queuing number calling machine in restaurant设计。

项目实践与典型支付场景

连锁快餐品牌的部署示例

以一个拥有20家门店的连锁快餐品牌为例：每家门店配置2台QUNMAO 21.5寸落地点餐机，全品牌共40台，支付方式为微信、支付宝扫码，并在机身预留位安装POS终端以支持银行卡；各门店通过聚合支付统一商户体系，点餐软件由QUNMAO按品牌的菜单与结算流程定制。部署按“先选1家试点门店，验证支付与对账，再分批铺开”的节奏推进。试点阶段重点记录三项数据：扫码一次成功率、掉单与重复扣款的笔数、日结报表与渠道账单的差异笔数。三项数据稳定、店员也熟悉了补打小票和退款流程之后，再把同一套配置复制到其余门店，这样即使个别环节需要调整，影响范围也控制在一家店之内。同类连锁快餐厅的完整设备方案与部署流程，可参考Fast food restaurant self-service ordering machine solution。

典型支付场景配置

下面四种配置是依据QUNMAO各机型规格书与餐饮门店常见的支付需求整理的示例，用于说明不同业态如何搭配支付方式，不代表特定客户项目。

部署建议与上线清单

支付功能的上线，建议按“资质、联调、真机验收、异常演练、对账演练”的顺序推进，每一项完成后再进入下一项。

• 商户资质与渠道开通：确认商户号、渠道开通状态、结算账户与费率，多门店品牌确认门店维度的商户体系。
• 测试环境联调：在测试环境完成被扫、主扫、查单、退款的全流程联调，验证签名与回调。
• 真机验收：在QUNMAO点餐机上逐项测试扫码识别、NFC、POS、打印出票，并记录成功率。
• 异常演练：模拟断网、重复扣款、支付中重启、缺纸等情况，确认系统能正确查单、补单或退款。
• 对账演练：用一天的测试数据，核对渠道账单、点餐订单和日结报表是否一致。
• 终端设置：开启开机自启与定时开关机，限制不必要的外设接入与系统操作。
• 人员培训：店员掌握补打小票、退款操作、异常订单上报的流程。
• 合规准备：使用刷脸时，完成告知文案、同意流程与影响评估，并保留替代支付方式。

设备点位、供电网络与安装固定方面的要求，可以对照Self-service ordering machine store deployment guide一并确认。更多自助终端设备与行业方案，可以查看自助终端机产品withSelf-service terminal solution。

Frequently Asked Questions