Commerce USPS

Commerce USPS module provides shipping calculations from the USPS WebTools API

Dependencies

This module depends on the Commerce module.

In addition, the following modules are required:

• Commerce Physical - This module is used to define the physical properties (weight and dimensions) of each product. This information is necessary to determine a shipping estimate.
• Commerce Shipping - This provides the infrastructure for Commerce UPS to fully integrate with the Commerce module.

Installation

1. Install and enable the module and all dependencies (be sure to use the latest versions of everything). Add dimensions and weight fields (new field types via the Commerce Physical module) to all shippable product types. Populate dimensions and weight fields for all products.
2. Configure the "Shipping service" checkout pane so that it is on the "Shipping" page. The "Shipping service" checkout pane MUST be on a later page than the "Shipping information" pane. (admin/commerce/config/checkout)
3. Configure the USPS settings (admin/commerce/config/shipping/methods/usps/edit). You'll need to create USPS WebTools account and obtain a username via https://secure.shippingapis.com/registration/.

Limitations

Eventually, all of these limitations may be addressed. For now, be warned.

1. Single "Ship from" address for all products.
2. Doesn't ensure product dimensions are less than default package size dimensions. In other words, if you have a product that is 1x1x20 (volume=20) and your default package size is 5x5x5 (volume=125), even though the product won't physically fit in the box, these values will be used to calculate the shipping estimate.
3. Doesn't play Tetris. For example, if you have an order with 14 products with a combined volume of 50 and your default package size has a volume of 60, the shipping estimate will be for a single box regardless of if due to the packaging shape they don't actually fit in the box.
4. Doesn't limit the weight of packages. If you're trying to ship a box full of lead that weighs 600lbs, this module will let you (instead of breaking the order into more packages).
5. Doesn't account for packing material. If you need to account for packing material, then you may want to adjust product dimensions accordingly.

Methodology

Calculating estimated shipping costs is a tricky business, and it can get really complicated really quickly. Knowing this, we purposely designed this module with simplicity in mind. Here's how it works:

1. Every order must contain at least one package.
2. The number of packages is determined by calculating the total volume of all products in the order, dividing by the volume of the default package size, and rounding up.
3. The weight of each package is determined by dividing the total weight of all products in the order by the number of packages.

If you need custom functionality, you have several options:

1. Determine if it is something that can be generalized to suit a number of users and submit it via the issue queue as a suggestion for inclusion in this module.
2. Hire one of the maintainers to create a custom module that interfaces with Commerce UPS to add your custom functionality.
3. Break open a text editor and start coding your own custom module.

Installation

• Install this module using the official Backdrop CMS instructions

Current Maintainers

• Seeking maintainers.

Credit

Originally maintained on Drupal by:

• https://www.drupal.org/u/andyg5000
• https://www.drupal.org/u/jsacksick
• https://www.drupal.org/u/mglaman
• https://www.drupal.org/u/rszrama
• https://www.drupal.org/u/andrew-m-riley

License

This project is GPL v2 software. See the LICENSE.txt file in this directory for complete text.