SMS-capable devices on Hologram’s cellular network can send messages to the Cloud Services Router via standard circuit-switched SMS messages to Hologram’s SMS inbox. You don’t need to specify API credentials, as Hologram can authenticate devices by their SIM cards.
Note: Each profile type (i.e. G1, G2, G3, etc) has a different Cloud number, which can be found by reaching out to our support team. Below is an example using a G1 SIM.
How do I send an outbound circuit-switched SMS from a SIM?
Hologram Cloud's phone number: +447937405250
Example SMS body
Hello, World!
The SMS message can be viewed in the All Activity drawer on the Dashboard. It will automatically include the _SMS_DO_ topic and the _DEVICE_[deviceid]_ topic associated with the SIM. You can also view the list of messages using the 'List All Data Engine Message' REST API endpoint.
Note: Sending SMS messages from your device on the Hologram network will incur fees at SMS rates, which are typically more costly than data rates. You can find the current SMS rate for your SIM in the SIM's Pricing tab.
Limited functionality
This feature is only available to standard Hologram SIMs. Indigo SIMs do not have access to send circuit-switched SMS to the Hologram Cloud.