Bosch IoT Device Management

Restrictions related to the device connectivity layer

Bosch IoT Hub has some resource restrictions in place to ensure service availability and to prevent service misuse. The following tables give an overview for the service quotas and resource restrictions.

Service plan



Number of registered devices per tenant

25 for Free plan
unlimited* for Standard plan

Number of messages per tenant per month

100.000 for Free plan for Standard plan

Device connection time per tenant per month (minutes)
(relevant only for connection based protocols)

50.000 for Free plan
500.000.000 for Standard 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



Ports used

HTTP: 443
MQTT: 8883
AMQP: 5671

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




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



Number of free plans per account


Retention policy for events

60 seconds for Free plan
24 hours for Standard plan

Queue size for events

1 MB for Free plan
5 GB for Standard plan

Queue size for telemetry

1 MB for Free plan
2 GB for Standard plan

Maximal number of secrets per credential


Maximal number of CA certificates per tenant


Supported algorithms for CA public keys


Minimal length for CA public keys

RSA: 2048, ECDSA: 256

Maximal length for CA public keys

RSA: 4096, ECDSA: 384