# How to send acknowledgement in tcp
**URL:** https://discourse.nodered.org/t/how-to-send-acknowledgement-in-tcp/29074
**Category:** General
**Created:** [27 June 2020 15:29 UTC](https://discourse.nodered.org/t/how-to-send-acknowledgement-in-tcp/29074 "2020-06-27T15:29:06Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@VIKRAMAS](https://discourse.nodered.org/u/VIKRAMAS)
#### Post date: [27 June 2020 15:29 UTC](https://discourse.nodered.org/t/how-to-send-acknowledgement-in-tcp/29074/1 "2020-06-27T15:29:06Z")
I am having three node cluster of node-red and having a tcp listening node. So, whenever the I'll receive the first packet I have to send the acknowledgment message for the socket and also I need to store this deviceid and connection in Redis for further communication. For further request, I'll receive only telemetry data without deviceid. So, I have to fetch device id by using tcp connection. So, how can I do this using node-red. How can I send the acknowledgement part for the same socket and also store the connection in redis to get deviceid.
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [26 August 2020 15:29 UTC](https://discourse.nodered.org/t/how-to-send-acknowledgement-in-tcp/29074/2 "2020-08-26T15:29:15Z")
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