Restrictions related to the device connectivity layer
Please consider the following restrictions related to the device connectivity layer.
Service plan
Resource |
Description |
Number of registered devices per tenant |
25 for Free plan |
Number of messages per tenant per month |
100.000 for Free plan |
Device connection time per tenant per month (minutes) |
50.000 for Free plan |
*Please take into account, that you can register any number of the devices, the number of simultaneously connected devices is restricted. Please contact us for further information.
Protocol adapters
Resource |
Description |
Ports used |
HTTP: 443 |
HTTP protocol adapter: request timeout |
60 seconds |
MQTT protocol adapter: connection inactivity |
60 seconds |
MQTT protocol adapter: number of allowed connect requests per tenant per second |
50 connect requests per second |
CoAP protocol adapter: NAT timeout |
120 seconds |
Payload
Resource |
Description |
Message size used to calculate service plan quota |
2 KB or 4 KB, depending on service plan |
Maximum message size for one request |
64 KB |
General restrictions
Resource |
Description |
Number of free plans per account |
3 |
Retention policy for events |
60 seconds for Free plan |
Queue size for events |
1 MB for Free plan |
Queue size for telemetry |
1 MB for Free plan |
Maximal number of secrets per credential |
10 |
Maximal number of CA certificates per tenant |
5 |
Maximum number of credentials per device |
10 |
Supported algorithms for CA public keys |
RSA, ECDSA |
Minimal length for CA public keys |
RSA: 2048, ECDSA: 256 |
Maximal length for CA public keys |
RSA: 4096, ECDSA: 384 |