1 files changed, 33 insertions, 0 deletions
diff --git a/stm32f091/protocol.c b/stm32f091/protocol.c
new file mode 100644
index 0000000..589ee5d
--- /dev/null
+++ b/stm32f091/protocol.c
@@ -0,0 +1,33 @@
+#include <stdio.h>
+
+#include "../shared/protocol.h"
+#include "backlog.h"
+#include "util.h"
+
+void ws_protocol_res_last_records(ws_s_protocol_parsed_req_cmd* parsed_cmd, ws_s_protocol_res* response, bool send) {
+	static unsigned int record_amount = 0;
+	const char* response_header = "id,temperature,humidity,atmospheric_pressure\n";
+	const size_t response_line_size = sizeof("xxxx,xx,xx,xx\n");
+
+	if (!send) {
+		response->success = WS_PROTOCOL_CMD_RETURN_OK;
+		if (sscanf(parsed_cmd->argv[1], "%u", &record_amount) < 1) response->success = WS_PROTOCOL_CMD_RETURN_ERROR;
+		record_amount = WS_MIN(record_amount, ws_backlog_get_record_count());
+		response->csh = true;
+		response->msg = ws_bin_s_alloc(0);
+		response->msg->bytes = strlen(response_header) + response_line_size * record_amount;
+	} else {
+		ws_protocol_send_data(response_header, strlen(response_header));
+		char line[response_line_size + 1]; // +1 for null terminator -> sprintf
+		for (unsigned int i = 0; i < record_amount; i++) {
+			ws_s_backlog_record* record = ws_backlog_get_last_record(i);
+			sprintf(line, "%04x,%02x,%02x,%02x\n", record->id, record->sens_temperature, record->sens_humidity, record->sens_atm_pressure);
+			ws_protocol_send_data(line, response_line_size);
+		}
+	}
+}
+
+void ws_protocol_send_data(const char* data, unsigned int length) {
+	//TODO: implement on esp data channels
+	HAL_UART_Transmit(&huart2, (uint8_t*) data, length, HAL_MAX_DELAY);
+}