Every C# SDK version is listed below, from the current version down to the first release.
| Version | Summary |
|---|---|
| 0.0.5.20 (Current) | Consolidated low-level serial rx handling in lowlevel_serial_t (head-only framing, a poll-friendly sleep, and a named reader thread); fixed a vmc_link link-down issue where a missed ack left a packet pending forever and stopped keepalive (retransmit is no longer gated on transmit exceeding receive); vmc_vend_t now handles session_end and send_transfer_data globally in any state for a more robust vend flow |
| 0.0.5.19 | Improved link reliability and fixed false retransmissions |
| 0.0.5.18 | Fixed a race condition between the rx and tx threads on m_pending_tx_msg access |
| 0.0.5.17 | Added the pre_auth_amount_config (0x8c) vend sub-command, including the message class, decode/encode support, a factory method, event handling, and the public API; added demo menu options to align with the Java SDK (check balance, prepaid pay, pre-auth config, display message, close socket) |
| 0.0.5.16 | Multi-vend max products per Marshall message are now calculated from the negotiated max message size; fixed the session_end timeout expiring too soon, which caused reader_always_on to fire early |
| 0.0.5.15 | Aligned the C# SDK with the Java SDK across all modules: fixed transfer_data bitmap constants and several encode bugs (msg_time_rsp_t, msg_setup_max_min_prices_t, msg_remote_selection_t, msg_expansion_t, msg_reader_state_t), added missing message classes and factory dispatch for vposm_ext/ev_ext messages, added consumer_id and other transfer_data fields, and fixed numerous session, socket, and general-module bugs across vmc_vend_t, vmc_general_t, vmc_socket_t, and vmc_link |
| 0.0.5.14 | Added real-time price change support for always-idle mode, even after the reader is already enabled, and a sanity check so vend_request and close_session return a boolean value and reject a price exceeding the permitted amount (65k when long_price is disabled); fixed a session_id decode issue on msg_single_vend_t and updated multi-vend request logging |
| 0.0.5.13 | Aligned the C# SDK with the Java SDK; fixed multi_vend_session_close encoding |
| 0.0.5.12 | Added protection against vend, socket, and general actions being issued when there is no link, preventing unnecessary crashes; optimized eth_port logging |
| 0.0.5.11 | Removed an unnecessary and alarming “spurious ack” warning; fixed eth_port to recover when VPOS restarts but the socket does not close on the VMC side, by closing and reconnecting |
| 0.0.5.10 | Fixed multi-vend multi-session packet encoding |
| 0.0.5.09 | Fixed a potential packet loss from buffer wraparound that triggered retransmission and a bug where card data was not cleared after a transaction ended; eth_port is now functional |
| 0.0.5.08 | Added enhanced display control (VPOSM) with legacy support for VPOS Touch devices and updated the sample application to support various display control layouts; stabilized the eth_port implementation |
| 0.0.5.07 | Fixed frame-size detection with better sanity checks to support varying Marshall message sizes; added a flush() call to the port interface |
| 0.0.5.06 | Added site ID and brand name transfer to the machine via transfer data and a new technician-mode command to open the door remotely; fixed long price for a single product |
| 0.0.5.05 | Added brand selection and custom transaction_id generation |
| 0.0.5.04 | Fixed an issue receiving on_begin_session on the latest SDK |
| 0.0.5.03 | Added long price support (VPOSM) and QR third-party authorization support; fixed the negative price display issue |
| 0.0.5.02 | Removed a CPU starvation warning that was confusing implementers |
| 0.0.5.01 | Removed lowlevel_serial; you now inject a serial_port_i implementation (a working pc_port.cs is provided); fixed the VPOS serial number being returned as raw bytes instead of a correctly arranged string |
| 0.0.4.23 | Fixed a re-transmission bug in buffer management that could lose consecutive packets arriving at the same time, an mdb_rsp parsing bug (Marshall master), a lowlevel_serial buffer management bug, and a string TLV decoding bug affecting transfer_data parsing |
| 0.0.4.22 | Added a session_id field to vend_session_t for multi-session reference; fixed an error parsing msg_display_event_t that skipped the user callback |
| 0.0.4.21 | Fixed card_balance decoding and possible crashes parsing transfer_data, including variable-length integer fields; changed the .NET version to 4.6.2 |
| 0.0.4.20 | Added a logger API to dump raw data to a log file |
| 0.0.4.19 | Fixed an undefined state machine state when on_begin_session arrived without a session starting, and deadlock risks from calling the API regardless of link state or stalling a callback while waiting for end_session; added the ability to send transfer data throughout the transaction starting at card detection, and added SDK configuration logging |
| 0.0.4.17 | Added check-balance session type, card sub type and card balance transfer_data, vend discount/final price calculation, and support for switching to an info session on always-idle setups; fixed e-receipt not working on multi-session setups, a race condition between rx and tx threads causing retransmission of an already-acked packet, and a possible crash when losing communication while sending reader_enable |
| 0.0.4.16 | Fixed a multi-instance bug affecting both the sample application and the SDK |
| 0.0.4.15 | Added the ability to instantiate multiple Marshall links |
| 0.0.4.14 | Fixed the item price and code API type (integer to short) and a crash when cancelling a session after the card is presented but before vend is requested |
| 0.0.4.13 | Fixed a transfer_data parsing error that missed several tags |
| 0.0.4.12 | session_status on the session object is now filled in by the SDK to report the transaction cancellation reason; fixed session cancel in always-idle mode; optimized lowlevel_serial CPU usage |
| 0.0.4.11 | Added packet dumps on rx re-arrangement for debugging; improved lowlevel_serial handling under stress |
| 0.0.4.10 | Added vend_status(bool) for explicit vend success, the total charged (and discount, if any) on the session structure, and absolute POSIX timestamps in log lines; renamed Log.initialize() to Log.stream(); fixed a vend-cancel timing bug and a false CPU warning on SDK initialization |
| 0.0.4.9 | Added an extra data parameter to the onStatus API and device_not_available_reason enums; fixed a faulty transfer_data parsing issue; the sample application now shows a human-readable status code and extra VPOS info on onReady |
| 0.0.4.8 | Added Log.console(boolean), new transfer_data fields (main and POS firmware versions, Monyx ID, default credit), new device status enums, and the onSessionTimeout(id) event; reworked the sample application |
| 0.0.4.7 | Added unit_of_measure enum values to vmc_vend; aligned log output between terminal and file |
| 0.0.4.6 | Improved lowlevel_serial link reliability; fixed the fw_info field arrangement, a vend session status request bug, and a vmc_socket busy/retransmit timeout bug |
| 0.0.4.5 | Added semaphore protection on the tx_buf reference critical section |
| 0.0.4.4 | Aligned with Marshall 3.0: added session status query, an fw_info SDK version string field, reader state retrieval, entry type enum, QR e-receipt, and remote vend; added CPU monitoring, a multi-vend product limit to avoid buffer overflow, and additional VMC info fields to fw_info; rewrote the sample application |
| 0.0.4.3 | Added the ability to start and stop file logging at runtime |
| 0.0.4.2 | Fixed a UI event bug |
| 0.0.4.1 | Added protection against disabling the reader in idle mode and display event callbacks |
| 0.0.4.0 | Added display control support, extra status codes, and the onStatus vend callback (see marshall_t.status_xxxx) |
| 0.0.3.5 | Fixed MSR card encoding |
| 0.0.3.4 | Added serial port access protection to lowlevel_serial_t and optimized access; changed the vend onReady callback to provide the last session object (null on the first call) |
| 0.0.3.3 | Fixed an error calling start_session from onReady() |
| 0.0.3.2 | Added the ability to direct SDK logs to a file and the Monyx card to the card_type enum; fixed a multi-vend crash from invalid log string formatting and a get_transaction_id() bug returning an invalid date inside onTransactionInfo |
| 0.0.3.1 | Added serial packet dump-level and vend-denied policy parameters, and a session_timeout status type on the session class |
| 0.0.3.0 | Updated to the latest Marshall protocol revision: link establishment now reports merchant ID, terminal ID, and machine location; added socket MTU and timeout configuration |
| 0.0.2.17 | Clarified that the empty-queue error is a notification, not an error |
| 0.0.2.16 | Fixed the always-idle bug |
| 0.0.2.15 | Updated the vmc_general events interface; fixed reader_always_on to apply only when always-idle is explicitly disabled |
| 0.0.2.14 | Added the ability to enable or disable log output and an always-idle sample |
| 0.0.2.13 | Fixed a “stop” issue preventing restart; added vmc_framework.get_version() |
| 0.0.2.12 | Fixed a critical link bug |
| 0.0.2.11 | Added the paymarket machine type; changed the EV-charger machine type |
| 0.0.2.10 | Added machine type to configuration and always-idle mode; improved socket handling; fixed a false mismatch-message-ID warning, a fund-available conversion issue, and a machine serial/version/model string length limit |
| 0.0.2.9 | Fixed a link bug that sometimes tried to transmit from an empty queue |
| 0.0.2.8 | Added parsing of the transfer_data structure on vend sessions for detailed, readable information |
| 0.0.2.7 | Improved socket logging and changed the low-level interface; the onReady(...) callback now transfers VPOS configuration; added a multi_vend_support flag to vmc_configuration (VPOS must be configured for pre-authorization to use multi-vend sessions); fixed a bug preventing some Marshall APIs from being called from onReady(...) |
| 0.0.2.6 | Unified the vend request API for single and multi-vend, with products declared on vend_session_t |
| 0.0.2.5 | Added quantity reporting to DCS (requires VPOS 4.0.1.5 rc9 or newer) and a transaction ID report API; fixed session cancel issues after a card is presented but before vend is requested, and when closing a session while the reader is enabled |
| 0.0.2.4 | Fixed model/version reporting to DCS; separated the keep-alive timer from the configured timeout |
| 0.0.2.3 | Added a log message and link statistics; fixed a buffer-index parsing bug in the middle of the master buffer |
| 0.0.2.2 | Fixed a communications issue |
| 0.0.2.1 | Fixed a re-transmit timeout that sometimes fired too fast |
| 0.0.2.0 | Improved the low_level_serial example; added handling for Marshall piggy-back messages; fixed a re-transmit bug |
| 0.0.1.9 | Added a VMC auth sample; improved the low_level_serial example |
| 0.0.1.8 | Fixed a link issue; added CC last-4-digits transfer data |
| 0.0.1.7 | Added reader-always-on mode and cash sale |
| 0.0.1.6 | Fixed a session close status bug; added a cash sale notification API |
| 0.0.1.5 | Added Mifare/mag auth support |
| 0.0.1.4 | Added socket support and info session support |
| 0.0.1.3 | Initial version |