# What is MQTT? | Cedalo's Roger Light | Internet of Things Podcast

- Show: [IoT For All Podcast](https://hardwarepodcasts.com/podcast/iot-for-all-podcast)
- Published: 2023-10-10
- Length: 14m
- Episode: 315
- Page: https://hardwarepodcasts.com/podcast/iot-for-all-podcast/2023-10-10-what-is-mqtt-cedalos-roger-light-internet-of-things-podcast
- Listen: https://podcasters.spotify.com/pod/show/iot-for-all/episodes/What-is-MQTT---Cedalos-Roger-Light--Internet-of-Things-Podcast-e2abvk7

## Summary

Roger Light, Senior Developer at Cedalo and inventor of the open-source Mosquitto MQTT broker, explains the fundamentals of the MQTT protocol, its publish-subscribe architecture, and its dominance in the IoT space. He discusses how to evaluate different MQTT brokers based on resource constraints and scalability, emphasizing the importance of security features like TLS and client certificates. Light also outlines key use cases such as industrial monitoring and railway signaling, while addressing the varying challenges organizations face when scaling MQTT deployments.

## Chapters

- [0:04](https://hardwarepodcasts.com/podcast/iot-for-all-podcast/2023-10-10-what-is-mqtt-cedalos-roger-light-internet-of-things-podcast#t=4) Introduction: Roger Light and Cedalo
- [0:39](https://hardwarepodcasts.com/podcast/iot-for-all-podcast/2023-10-10-what-is-mqtt-cedalos-roger-light-internet-of-things-podcast#t=39) What is MQTT and how it works
- [1:44](https://hardwarepodcasts.com/podcast/iot-for-all-podcast/2023-10-10-what-is-mqtt-cedalos-roger-light-internet-of-things-podcast#t=104) MQTT alternatives and use cases
- [4:06](https://hardwarepodcasts.com/podcast/iot-for-all-podcast/2023-10-10-what-is-mqtt-cedalos-roger-light-internet-of-things-podcast#t=246) Differentiating MQTT brokers
- [6:12](https://hardwarepodcasts.com/podcast/iot-for-all-podcast/2023-10-10-what-is-mqtt-cedalos-roger-light-internet-of-things-podcast#t=372) MQTT security and authentication
- [8:17](https://hardwarepodcasts.com/podcast/iot-for-all-podcast/2023-10-10-what-is-mqtt-cedalos-roger-light-internet-of-things-podcast#t=497) MQTT stakeholders and adoption
- [9:34](https://hardwarepodcasts.com/podcast/iot-for-all-podcast/2023-10-10-what-is-mqtt-cedalos-roger-light-internet-of-things-podcast#t=574) Challenges in scaling MQTT
- [11:07](https://hardwarepodcasts.com/podcast/iot-for-all-podcast/2023-10-10-what-is-mqtt-cedalos-roger-light-internet-of-things-podcast#t=667) Future of MQTT and Sparkplug

## Topics

- [Connected products & IoT](https://hardwarepodcasts.com/topic/connected-products-and-iot)
- [Wireless & RF](https://hardwarepodcasts.com/topic/wireless-and-rf)
- [Security & privacy](https://hardwarepodcasts.com/topic/security-and-privacy)

## Most relevant to

established companies

## Mentioned

- Cedalo (company)
- Mosquitto (product)
- San Arlo (company)
- Sparkplug (product)
- Lora (other)

## Related episodes from other shows

- [MQTT Anywhere, LoRaWAN Sheep Tracking, More DOOM on everything!](https://hardwarepodcasts.com/podcast/the-electromaker-show/2023-09-25-mqtt-anywhere-lorawan-sheep-tracking-more-doom-on-everything) (The Electromaker Show)
- [515: Script Boomers](https://hardwarepodcasts.com/podcast/embedded-fm/2025-11-27-515-script-boomers) (Embedded.fm)
- [An Interview With Luke Beno of Analog.io](https://hardwarepodcasts.com/podcast/the-amp-hour/2015-10-23-an-interview-with-luke-beno-of-analog-io) (The Amp Hour)
- [Building Customer-Focused IoT Applications Easier with Charlie Key, Co-founder and CEO of Losant](https://hardwarepodcasts.com/podcast/over-the-air/2022-08-04-building-customer-focused-iot-applications-easier-with-charlie-key-co-founder-an) (Over the Air)
- [CES 2019 Special: Matt Johnson, Silicon Labs](https://hardwarepodcasts.com/podcast/ee-times-current/2019-01-16-ces-2019-special-matt-johnson-silicon-labs) (EE Times Current)

## Citing this page

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