UIFLOW2 Release 2.1.5 based on Micropython v1.22.0 - feature(Software): Add modbus Lib. - feature(Unit): Add UHF-RFID Unit support. - feature(Unit): Add ACSSR Unit support. - feature(Unit): Add DCSSR Unit support. - feature(Unit): Add NB-IoT2 Unit support. - fix(Ezdata): Update the value of the dataType field. - fix(Unit): Add sendbreak/flush/txdone method. - fix(Unit): Fix MFRC522 write.