We are excited to announce two new downlink APIs, Sim:sendDownlinkHttp and Sim:sendDownlinkSsh, which allow you to send data and commands to IoT SIM devices through the Soracom API.

Traditionally, sending cloud-to-device data or commands via IP communication has been difficult due to firewall and routing restrictions that require complicated network configurations or device-side applications.

These new APIs allow you to create HTTP/HTTPS requests or SSH connections directly to your device from within Soracom, and removes the need to set up advanced network architecture, keep track of device IP addresses, or implement custom device-side logic. Simply call the downlink API specifying the data or commands to send, and Soracom will create the request or connection and return any response or output from the device back as the response of the API call.

These APIs are especially beneficial to battery-powered or legacy embedded devices with resource contraints. When combined with Soracom Flux, calling these APIs can even be automated in order to easily build sophisticated IoT systems, such as sending commands to devices based on detected sensor data or cloud events.

Please note: Pricing for Sim:sendDownlinkHttp and Sim:sendDownlinkSsh APIs is scheduled to be announced in June 2025. Until then, these APIs are free to use.

For a detailed usage guide, please see the Downlink API documentation.