Rochelle Vick's eldest son Ashton, who attends Lindon Bennett School in Hanworth, was diagnosed with the condition at the age of three in 2012, prior to which he was able to say a few words and ate a variety of food.
But one day everything changed, said the mum-of-three, and after much research and consideration she decided to set up a fundraising page to get help to buy the costly device which could assist Ashton to eventually speak one day.
The 26-year-old said: "One day he just changed and was a completely different child and hardly eats anything now and doesn't speak.
"I never knew the signs (as he was my first child), I just took everything as normal, but then a friend mentioned to me that Ashton was behaving much like a nephew of hers who also has autism.
"After his diagnosis, the speech therapy continued until he went to school then he began the therapy at school.
"He attends Lindon Bennett School in Hanworth and I can't thank them enough for the work they do with my son they are absolutely amazing!"
Everyday life is a struggle for Ashton, who cannot speak but can make his needs known through a Picture Exchange Communication System (PECS) - using picture cards to help communicate messages.
The speaking aid known as Tobii Dynavox m-8 is pricey at £2,800 but can help Ashton make sentences and words he needs too, saying them out loud, in the hope it will encourage him to say something himself.
Miss Vick added: “It breaks my heart that my son cannot express his needs with speech and I long for the day he can communicate with me and his siblings in anyway shape or form.
“This speaking aid costs over £2,800 and the only way I can get there is fundraise.
“There are some nice kind-hearted people out there willing to help and so far we have raised over £300 now, which is amazing and I am so grateful... but nowhere near enough yet!”
Ashton is an older brother to two siblings, five-year-old brother Elijah, and sister Deja-Lovelle, just 18-months-old.
His family are desperate to help the young boy communicate with them on a daily basis and strongly believe the device would improve his life from simply being able to put a sentence together.
Ms Vick said: “I just want to hear my boy talk anyway he can.”