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EditSeverin RB7025, Dirt Devil Spider (M607)

This page needs a lot of tidying up.

Severin RB7025 and Dirt Devil Spider (M607) are identical[1].

There is also a chance that Dirt Devil Libero (M606) is quite similar.

In terms of custom firmware, these are the most hopeless vacuum cleaners that could ever be found.


Let's list some of the problems:

Basically, that's enough to understand that any further reverse-engineering is a waste of time. But here is a pinout anyway:


Pin Type Function pullup/pulldown active Comment
1out green LED high
2in bumper or sensor +5V low
3out buzzer requires PWM, also 1-pin connector on the board is connected here
4power VDD
5in battery low +5V
6out vacuum and side brushes high
7in top lid
8out left wheel forward high
9out left wheel back high
10?battery charged probably input, when charging “high” means “charged”
11power VSS
12out right wheel back high
13out right wheel forward high
14out red led also connected to unpopulated port, no idea what these port do (both are connected together)

Some “pullup/pulldown” and “active” cells are empty. Filling those has no practical value because nobody is going to attempt to reflash it anyway (and if somebody does, you will probably figure it out yourself).



Port 10 is likely output, since pulling it HIGH stops charging. The charging cycle doesn't stop by itself.

I guess ports 5 (batt low) and 14 (red led) could be shorted, so that low battery means the corresponding led turns on. On the other hand, keeping pin 5 connected to a microprocessor means you can start the return-home-procedure.

-- Thijsmans 2018-06-13 20:37 UTC

I think you are overly harsh. Sure, the Dirt Devil is cheap and basic, but if anything it makes it more suitable to hack. I replaced its chip with a WEMOS D1-D2 to give it wifi ( and the next step will be a LOLIN32 so I can add IR capabilities, some more bumperswitches and use all the inputs... wish me luck!

-- paai 2018-10-01 07:52 UTC

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