electric meter reading rewrite - Page 1
Forum section: electronics / beginners

author: rehan
author_rank: Newbie
timestamp: June 01, 2022, 10:25:59 pm
content: hello friends hope every one is doing greatmy uncle got his meter programmed by some one guy he open up meter install 3 things1.Arduino Pro Mini ATMEGA3282.HC-05 Bluetooth Module3.and 12 volt circuitthe function of this update is you can change meter current reading with phone appand the guy was also able to copy old meter serial no in new meter LCD because old meter was deadi dont known how he did it might be same way like changing current reading just by giving diff ASCII command i want to known how i can connect this meter Arduino Pro Mini to pc for read the code it have for communication compatible with meter boardand meter is some how locked with only my uncle phone i test in my phone try same way and it looks same like every thing works meter resets after command but meter reading didnt changed i even try copy uncle phone Bluetooth mac to my rooted phone but still didn't works i want to known how its locked with only his phonethe code used for changing meter readingexample current reading is 300121 249 00 40 00 01hit w then enter this fast meter reboots with new reading 4000if u want change it back to 300121 249 00 03 00 01thats how the ASCII codes worksthe last digits are current meter reading but i dont known the first 6 digits for if some one known about this pm me maybe its hex or ASCII or what ever i try convert comes nothingthis w needs to send before reading codeif you hit R then it gives to meter eeprom data i dont understand muchold meter serial changed inside new meter LCD board and used old meter bodyold reading before sending ASCII codenew current meter reading after sending ASCII codeif any one understand what i just showed in this long post and known how to read Arduino code please do helpvideo demonstration shown below

author: Ian.M
author_rank: Super Contributor
timestamp: June 01, 2022, 10:55:23 pm
content: Quote from: rehan on June 01, 2022, 10:25:59 pmDo you own the meter? (i.e. can produce an invoice and receipt for its purchase, that match the above meter P.O. number 6160-66 and serial number P-00558494)If so, why are you trying to cheat your tenants?If not, Theft of Electricity is *VERY* illegal in Pakistan (as in most other countries), and there is a freephone number to report it +92-800-84338. I understand large rewards can be payable to anyone reporting theft leading to successful prosecution.https://tribune.com.pk/story/580774/3-years-in-prison-rs10m-fine-for-persons-involved-in-electricity-theft-ccihttps://na.gov.pk/uploads/documents/1456203923_967.pdf

author: Halcyon
author_rank: Unknown
timestamp: June 01, 2022, 11:05:48 pm
content: Whilst just about anything goes on this forum, be mindful that unauthorised modification of electricity meters is illegal in most parts of the world. No one here will help you commit fraud and cheat the system.

author: rehan
author_rank: Newbie
timestamp: June 01, 2022, 11:07:30 pm
content: no its not for cheat purpose, its for study/educational purpose

author: Ian.M
author_rank: Super Contributor
timestamp: June 01, 2022, 11:21:57 pm
content: Quote from: rehan on June 01, 2022, 11:07:30 pmThat's what they all say, but lets go with it for now . . .Can we see your electricity meter test and calibration bench, and the building its in, showing the company name or technical college name?Lets hope your telling us the truth, because if not, there is enough evidence above for any of our other Pakistani users to earn up to $1000 USD (approx) reward by reporting you!

author: EEVblog
author_rank: Unknown
timestamp: June 01, 2022, 11:26:05 pm
content: Quote from: rehan on June 01, 2022, 11:07:30 pmI suspect no one here is going to believe that.

author: Manul
author_rank: Super Contributor
timestamp: June 02, 2022, 12:01:10 am
content: Offtopic, but this thread reminded me a story which happened when I was a kid.We lived in a countryside house, electricity was distributed by low voltage overhead lines. One summer a lightning struck the lines near our house and the power meter (mechanical) started running backwards (!). Few days later there was another strike after which meter stopped completely. Two things I will never forget: insane amount of thunderstorms during that summer and a surreal view of a power meter running backwards. Week or two later authorities came to replace the meter and calculated usage based on average monthly consumption.

author: ealex
author_rank: Frequent Contributor
timestamp: June 02, 2022, 02:11:00 pm
content: @rehan - just for educational purpose:most electronic meters have some kind of communication interface that's used for calibration and on-field readingi've seen some that have an IR port - bi-directional or, in some cases, with some kind of cover over the RX photo diode => it's bidirectional on the calibration stand but TX-only once the tamper-proof seals are addedthe TX path send the displayed data - usually ASCII 8N1 at a slow baud-rate.some newer units send data over the power line - remote reading and some other "funny" stuff (remote disconnect for example)based on the photos from your first post - the parts where installed inside the unit to make a bluetooth communication interface.the app replaces factory configuration / calibration tool and allows to tamper with the meterfrom what I know that's quite illegal - fines / jail - depending on your legislationyou can search youtube for "smart meter teardown":andi think it's ok to play with it on your bench (at least I can but one from a retail store, as an individual ) and nobody will care as long as you don't install it in the grid / sell some kind of hacking solution.again, I have no clue about your legislation => do your homework.