He was born in the "Daraza" village of Khairpur (Sindh, Pakistan), in 1739 A.D. His real name was Abdul Wahab. He adopted the name "Sachal" which means "one living in truth". And "Sarmast" means "A leader of the intoxicated one's".

Nadir Shah invaded and looted Sindh the very year Sachal was born. This was the period when the Mughal dynasty in India was in the doldrums and ultimately came to an ignominious end.

Sachal Sarmast lost his father when he was very young. He was raised by his uncle who was also his spiritual master. He married his cousin who died two years later and Sachal did not marry again.

During his childhood, once Sachal Sarmast went to Shah Abdul Latif Bhittai, who looked at him and said this little boy will complete his mission.

Sachal lost his father when he was very young; his uncle who was also his spiritual master raised him. He married his cousin who died two years later and Sachal did not marry again. Shah met Sachal as a small boy and prophesied that he will complete his mission.

Sachal was a great lover of music. Touched by music, he would often cry profusely. Couplets would pour out from his lips which his followers or fellow dervishes would immediately inscribe. Sachal is well known for his kalam as well as kafis conveying his spiritual message in haunting melodies. Sachal liked solitude and silence. He never traveled out from his village Darraza. He was very simple in his dress, lifestyle and eating habits. Daal (lentil soup) and dahi (yoghurt) were his favorites. He slept on a bare wooden sandal or divan. He was a humble man with long soft flowing hair, penetrating eyes and a melancholy countenance. he composed poetical pieces in Arabic, Sindhi, Seraiki, Punjabi, Urdu, Persian and Balochi, that is replete with Divine Love.

Sachal Sarmast was an ardent follower of wahdat-ul-wujood, a religious philosophy synonymous with 'Hamah oost' (there is no existence save the Ultimate Truth).

He once said: "Don't consider yourself a servant, you are the master yourself." He also said: "He is everywhere and in each and every phenomenon. He has come here just to witness His own manifestation."

Three days before his death, he retreated in a small enclave where he finally became one with truth on the 14th day of Ramzan in 1829 A. D. at the age of 90.

He was buried in the same place, later a beautiful & well decorated mausoleum was built at this place.