By rajpat1
using mqtt with esp8826 from example code in arduino ide mosquito broker running on droplet properly but gives following message from esp 8826 ( Attempting MQTT connection…failed, rc=-4 try again in 5 seconds )
not able to resolve this for some reason
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
how do you open firewall…?
The mqtt broker on droplet works when android mqtt client is used .I am assuming firewall is open.
only when using esp8826 the broker does not connect . which it does on local Raspberry pi mosquito broker
Become a contributor for community
Get paid to write technical tutorials and select a tech-focused charity to receive a matching donation.
DigitalOcean Documentation
Full documentation for every DigitalOcean product.
Resources for startups and SMBs
The Wave has everything you need to know about building a business, from raising funding to marketing your product.
The developer cloud
Scale up as you grow — whether you're running one virtual machine or ten thousand.
Get started for free
Sign up and get $200 in credit for your first 60 days with DigitalOcean.*
*This promotional offer applies to new accounts only.